diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75aa966df..e375ded80 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,5 @@
+- Compatibility fixes for Greasemonkey v2.
+
 ### 3.20.14 - *2014-06-13*
 
 - The QR won't duplicate single-word captchas anymore if you've input numbers only (like a street address).
diff --git a/lib/$.coffee b/lib/$.coffee
index 74cb1fda6..0fc1e4d1b 100644
--- a/lib/$.coffee
+++ b/lib/$.coffee
@@ -136,6 +136,10 @@ $.off = (el, events, handler) ->
     el.removeEventListener event, handler, false
   return
 $.event = (event, detail, root=d) ->
+  <% if (type === 'userscript') { %>
+  if detail? and typeof cloneInto is 'function'
+    detail = cloneInto detail, d.defaultView
+  <% } %>
   root.dispatchEvent new CustomEvent event, {bubbles: true, detail}
 <% if (type === 'userscript') { %>
 $.open = GM_openInTab
diff --git a/src/Filtering/Filter.coffee b/src/Filtering/Filter.coffee
index dd3cdbad9..81567c43b 100644
--- a/src/Filtering/Filter.coffee
+++ b/src/Filtering/Filter.coffee
@@ -167,7 +167,6 @@ Filter =
         textContent: 'Filter'
 
       entry =
-        type: 'post'
         el: div
         order: 50
         open: (post) ->
@@ -192,7 +191,7 @@ Filter =
         # Add a sub entry for each filter type.
         entry.subEntries.push Filter.menu.createSubEntry type[0], type[1]
 
-      $.event 'AddMenuEntry', entry
+      Menu.menu.addEntry entry
 
     createSubEntry: (text, type) ->
       el = $.el 'a',
diff --git a/src/Filtering/PostHiding.coffee b/src/Filtering/PostHiding.coffee
index 47afc0a12..a25539792 100644
--- a/src/Filtering/PostHiding.coffee
+++ b/src/Filtering/PostHiding.coffee
@@ -87,8 +87,7 @@ PostHiding =
       makeStub =
         el: $.el 'label', innerHTML: "<input type=checkbox name=makeStub checked=#{Conf['Stubs']}> Make stub"
 
-      $.event 'AddMenuEntry',
-        type: 'post'
+      Menu.menu.addEntry
         el: $.el 'div',
           textContent: 'Hide post'
           className: 'hide-post-link'
@@ -116,8 +115,7 @@ PostHiding =
           @el.firstChild.checked = if 'hideRecursively' of data then data.hideRecursively else Conf['Recursive Hiding']
           true
 
-      $.event 'AddMenuEntry',
-        type: 'post'
+      Menu.menu.addEntry
         el: $.el 'div',
           textContent: 'Unhide post'
           className: 'show-post-link'
@@ -131,8 +129,7 @@ PostHiding =
         subEntries: [apply, thisPost, replies]
 
       return if g.VIEW isnt 'index'
-      $.event 'AddMenuEntry',
-        type: 'post'
+      Menu.menu.addEntry
         el: $.el 'a', href: 'javascript:;'
         order: 20
         open: (post) ->
diff --git a/src/General/Header.coffee b/src/General/Header.coffee
index e6d6d09db..0a142a77c 100644
--- a/src/General/Header.coffee
+++ b/src/General/Header.coffee
@@ -8,7 +8,7 @@ Header =
     @hitzone = $ '#header-bar-hitzone', @bar
     @noticesRoot = $ '#notifications', headerEl
 
-    @menu = new UI.Menu 'header'
+    @menu = new UI.Menu()
     menuButton = $.el 'a',
       className: 'menu-button'
       innerHTML: '<i class="fa fa-bars"></i>'
@@ -61,8 +61,7 @@ Header =
     $.sync 'Top Board List',             @setTopBoardList
     $.sync 'Bottom Board List',          @setBotBoardList
 
-    $.event 'AddMenuEntry',
-      type: 'header'
+    @menu.addEntry
       el: $.el 'span', textContent: 'Header'
       order: 105
       subEntries: [
@@ -313,9 +312,8 @@ Header =
     Header.menu.toggle e, @, g
 
   createNotification: (e) ->
-    {type, content, lifetime, cb} = e.detail
+    {type, content, lifetime} = e.detail
     notice = new Notice type, content, lifetime
-    cb notice if cb
 
   areNotificationsEnabled: false
   enableDesktopNotifications: ->
diff --git a/src/General/Index.coffee b/src/General/Index.coffee
index 1d06c85ce..cdddd24d9 100644
--- a/src/General/Index.coffee
+++ b/src/General/Index.coffee
@@ -53,8 +53,7 @@ Index =
         when 'Show Replies'
           $.on input, 'change', @cb.replies
 
-    $.event 'AddMenuEntry',
-      type: 'header'
+    Header.menu.addEntry
       el: $.el 'span',
         textContent: 'Index Navigation'
       order: 90
@@ -115,8 +114,7 @@ Index =
     init: ->
       return if g.VIEW isnt 'index' or !Conf['Menu'] or g.BOARD.ID is 'f'
 
-      $.event 'AddMenuEntry',
-        type: 'post'
+      Menu.menu.addEntry
         el: $.el 'a', href: 'javascript:;'
         order: 19
         open: ({thread}) ->
@@ -615,7 +613,6 @@ Index =
         Index.buildHRs nodes
     $.rmAll Index.root
     $.add Index.root, nodes
-    $.event 'IndexBuild', nodes
 
   isSearching: false
   clearSearch: ->
diff --git a/src/General/Main.coffee b/src/General/Main.coffee
index e464f91fb..c488406d2 100644
--- a/src/General/Main.coffee
+++ b/src/General/Main.coffee
@@ -120,7 +120,6 @@ Main =
     initFeature 'Linkify',                  Linkify
     # c.timeEnd 'All initializations'
 
-    $.on d, 'AddCallback', Main.addCallback
     $.ready Main.initReady
 
   initStyle: ->
@@ -230,20 +229,6 @@ Main =
       # c.profileEnd callback.name
     Main.handleErrors errors if errors
 
-  addCallback: (e) ->
-    obj = e.detail
-    unless typeof obj.callback.name is 'string'
-      throw new Error "Invalid callback name: #{obj.callback.name}"
-    switch obj.type
-      when 'Post'
-        Klass = Post
-      when 'Thread'
-        Klass = Thread
-      else
-        return
-    obj.callback.isAddon = true
-    Klass.callbacks.push obj.callback
-
   handleErrors: (errors) ->
     unless errors instanceof Array
       error = errors
diff --git a/src/General/Settings.coffee b/src/General/Settings.coffee
index b3fa0bda8..7a687969e 100644
--- a/src/General/Settings.coffee
+++ b/src/General/Settings.coffee
@@ -6,8 +6,7 @@ Settings =
       textContent: '<%= meta.name %> Settings'
       href:        'javascript:;'
     $.on link, 'click', Settings.open
-    $.event 'AddMenuEntry',
-      type: 'header'
+    Header.menu.addEntry
       el: link
       order: 111
 
@@ -18,8 +17,7 @@ Settings =
     Settings.addSection 'Rice',     Settings.rice
     Settings.addSection 'Archives', Settings.archives
     Settings.addSection 'Keybinds', Settings.keybinds
-    $.on d, 'AddSettingsSection',   Settings.addSection
-    $.on d, 'OpenSettings',         (e) -> Settings.open e.detail
+    $.on d, 'OpenSettings', (e) -> Settings.open e.detail
 
     settings = JSON.parse(localStorage.getItem '4chan-settings') or {}
     return if settings.disableAll
@@ -65,8 +63,6 @@ Settings =
 
   sections: []
   addSection: (title, open) ->
-    if typeof title isnt 'string'
-      {title, open} = title.detail
     hyphenatedTitle = title.toLowerCase().replace /\s+/g, '-'
     Settings.sections.push {title, hyphenatedTitle, open}
   openSection: ->
diff --git a/src/General/UI.coffee b/src/General/UI.coffee
index 7dac2c2eb..31968106a 100644
--- a/src/General/UI.coffee
+++ b/src/General/UI.coffee
@@ -15,9 +15,7 @@ UI = do ->
     currentMenu       = null
     lastToggledButton = null
 
-    constructor: (@type) ->
-      # Doc here: https://github.com/MayhemYDG/4chan-x/wiki/Menu-API
-      $.on d, 'AddMenuEntry', @addEntry
+    constructor: ->
       @entries = []
 
     makeMenu: ->
@@ -172,9 +170,7 @@ UI = do ->
         $.addClass submenu, 'right'
         $.rmClass  submenu, 'left'
 
-    addEntry: (e) =>
-      entry = e.detail
-      return if entry.type isnt @type
+    addEntry: (entry) ->
       @parseEntry entry
       @entries.push entry
 
diff --git a/src/Images/ImageExpand.coffee b/src/Images/ImageExpand.coffee
index 7c2310260..ad3cb81bd 100644
--- a/src/Images/ImageExpand.coffee
+++ b/src/Images/ImageExpand.coffee
@@ -223,8 +223,7 @@ ImageExpand =
       for name, conf of Config.imageExpansion
         subEntries.push createSubEntry name, conf[1]
 
-      $.event 'AddMenuEntry',
-        type: 'header'
+      Header.menu.addEntry
         el: el
         order: 80
         subEntries: subEntries
diff --git a/src/Menu/ArchiveLink.coffee b/src/Menu/ArchiveLink.coffee
index 88ecc21b5..047aebc45 100644
--- a/src/Menu/ArchiveLink.coffee
+++ b/src/Menu/ArchiveLink.coffee
@@ -6,7 +6,6 @@ ArchiveLink =
       textContent: 'Archive'
 
     entry =
-      type: 'post'
       el: div
       order: 90
       open: ({ID, thread, board}) ->
@@ -25,7 +24,7 @@ ArchiveLink =
       # Add a sub entry for each type.
       entry.subEntries.push @createSubEntry type[0], type[1]
 
-    $.event 'AddMenuEntry', entry
+    Menu.menu.addEntry entry
 
   createSubEntry: (text, type) ->
     el = $.el 'a',
diff --git a/src/Menu/DeleteLink.coffee b/src/Menu/DeleteLink.coffee
index c79f24c98..031e8e50a 100644
--- a/src/Menu/DeleteLink.coffee
+++ b/src/Menu/DeleteLink.coffee
@@ -26,8 +26,7 @@ DeleteLink =
         $.on fileEl, 'click', DeleteLink.delete
         true
 
-    $.event 'AddMenuEntry',
-      type: 'post'
+    Menu.menu.addEntry
       el: div
       order: 40
       open: (post) ->
diff --git a/src/Menu/DownloadLink.coffee b/src/Menu/DownloadLink.coffee
index a93cfd8c0..eb5de83ae 100644
--- a/src/Menu/DownloadLink.coffee
+++ b/src/Menu/DownloadLink.coffee
@@ -5,8 +5,7 @@ DownloadLink =
     a = $.el 'a',
       className: 'download-link'
       textContent: 'Download file'
-    $.event 'AddMenuEntry',
-      type: 'post'
+    Menu.menu.addEntry
       el: a
       order: 70
       open: ({file}) ->
diff --git a/src/Menu/Labels.coffee b/src/Menu/Labels.coffee
index 726377b7d..0f04953c4 100644
--- a/src/Menu/Labels.coffee
+++ b/src/Menu/Labels.coffee
@@ -2,8 +2,7 @@ Labels =
   init: ->
     return if !Conf['Menu']
 
-    $.event 'AddMenuEntry',
-      type: 'post'
+    Menu.menu.addEntry
       el: $.el 'div', textContent: 'Labels'
       order: 60
       open: (post, addSubEntry) ->
diff --git a/src/Menu/Menu.coffee b/src/Menu/Menu.coffee
index 0388584ed..44c05acec 100644
--- a/src/Menu/Menu.coffee
+++ b/src/Menu/Menu.coffee
@@ -8,7 +8,7 @@ Menu =
       href:      'javascript:;'
     @frag = $.nodes [$.tn(' '), a]
 
-    @menu = new UI.Menu 'post'
+    @menu = new UI.Menu()
     Post.callbacks.push
       name: 'Menu'
       cb:   @node
diff --git a/src/Menu/ReportLink.coffee b/src/Menu/ReportLink.coffee
index c246c903f..58d2dc6bb 100644
--- a/src/Menu/ReportLink.coffee
+++ b/src/Menu/ReportLink.coffee
@@ -7,8 +7,7 @@ ReportLink =
       href: 'javascript:;'
       textContent: 'Report this post'
     $.on a, 'click', ReportLink.report
-    $.event 'AddMenuEntry',
-      type: 'post'
+    Menu.menu.addEntry
       el: a
       order: 10
       open: (post) ->
diff --git a/src/Miscellaneous/Fourchan.coffee b/src/Miscellaneous/Fourchan.coffee
index a0da2637d..14f7b491b 100644
--- a/src/Miscellaneous/Fourchan.coffee
+++ b/src/Miscellaneous/Fourchan.coffee
@@ -18,7 +18,7 @@ Fourchan =
         window.addEventListener('jsmath', function(e) {
           if (jsMath.loaded) {
             // process one post
-            jsMath.ProcessBeforeShowing(e.detail);
+            jsMath.ProcessBeforeShowing(document.getElementById(e.detail));
           } else {
             // load jsMath and process whole document
             jsMath.Autoload.Script.Push('ProcessBeforeShowing', [null]);
@@ -39,4 +39,4 @@ Fourchan =
     return
   math: ->
     return if @isClone or !$ '.math', @nodes.comment
-    $.event 'jsmath', @nodes.post, window
+    $.event 'jsmath', @nodes.post.id, window
diff --git a/src/Miscellaneous/PSAHiding.coffee b/src/Miscellaneous/PSAHiding.coffee
index 715b8dc2d..478d06764 100644
--- a/src/Miscellaneous/PSAHiding.coffee
+++ b/src/Miscellaneous/PSAHiding.coffee
@@ -11,14 +11,13 @@ PSAHiding =
       return
 
     entry =
-      type: 'header'
       el: $.el 'a',
         textContent: 'Show announcement'
         className: 'show-announcement'
         href: 'javascript:;'
       order: 50
       open: -> psa.hidden
-    $.event 'AddMenuEntry', entry
+    Header.menu.addEntry entry
     $.on entry.el, 'click', PSAHiding.toggle
 
     PSAHiding.btn = btn = $.el 'a',
diff --git a/src/Monitoring/ThreadUpdater.coffee b/src/Monitoring/ThreadUpdater.coffee
index 838b4403d..aa2861c0d 100644
--- a/src/Monitoring/ThreadUpdater.coffee
+++ b/src/Monitoring/ThreadUpdater.coffee
@@ -107,7 +107,6 @@ ThreadUpdater =
           ThreadUpdater.thread.kill()
           $.event 'ThreadUpdate',
             404: true
-            thread: ThreadUpdater.thread
         else
           ThreadUpdater.outdateCount++
           ThreadUpdater.setInterval()
@@ -203,8 +202,6 @@ ThreadUpdater =
       nodes.push node
       posts.push new Post node, ThreadUpdater.thread, ThreadUpdater.thread.board
 
-    deletedPosts = []
-    deletedFiles = []
     # Check for deleted posts/files.
     for ID, post of ThreadUpdater.thread.posts
       # XXX tmp fix for 4chan's racing condition
@@ -215,18 +212,14 @@ ThreadUpdater =
         post.resurrect()
       else unless ID in index
         post.kill()
-        deletedPosts.push post
       else if post.file and !post.file.isDead and ID not in files
         post.kill true
-        deletedFiles.push post
 
     sendEvent = ->
       $.event 'ThreadUpdate',
         404: false
-        thread: ThreadUpdater.thread
-        newPosts: posts
-        deletedPosts: deletedPosts
-        deletedFiles: deletedFiles
+        threadID: ThreadUpdater.thread.fullID
+        newPosts: posts.map (post) -> post.fullID
         postCount: OP.replies + 1
         fileCount: OP.images + (!!ThreadUpdater.thread.OP.file and !ThreadUpdater.thread.OP.file.isDead)
 
diff --git a/src/Monitoring/ThreadWatcher.coffee b/src/Monitoring/ThreadWatcher.coffee
index 21c0a3e2d..4da971ac3 100644
--- a/src/Monitoring/ThreadWatcher.coffee
+++ b/src/Monitoring/ThreadWatcher.coffee
@@ -65,12 +65,12 @@ ThreadWatcher =
       [boardID, threadID] = @parentNode.dataset.fullID.split '.'
       ThreadWatcher.rm boardID, +threadID
     post: (e) ->
-      {board, postID, threadID} = e.detail
+      {boardID, threadID, postID} = e.detail
       if postID is threadID
         if Conf['Auto Watch']
           $.set 'AutoWatch', threadID
       else if Conf['Auto Watch Reply']
-        ThreadWatcher.add board.threads[threadID]
+        ThreadWatcher.add g.threads[boardID + '.' + threadID]
     onIndexRefresh: ->
       boardID = g.BOARD.ID
       for threadID, data of ThreadWatcher.db.data.boards[boardID] when not data.isDead and threadID not of g.BOARD.threads
@@ -81,10 +81,9 @@ ThreadWatcher =
           ThreadWatcher.db.set {boardID, threadID, val: data}
       ThreadWatcher.refresh()
     onThreadRefresh: (e) ->
-      {thread} = e.detail
       return unless e.detail[404] and ThreadWatcher.db.get {boardID: thread.board.ID, threadID: thread.ID}
       # Update 404 status.
-      ThreadWatcher.add thread
+      ThreadWatcher.add g.threads[e.detail.threadID]
 
   fetchCount:
     fetched:  0
@@ -204,18 +203,17 @@ ThreadWatcher =
     refreshers: []
     init: ->
       return if !Conf['Thread Watcher']
-      menu = new UI.Menu 'thread watcher'
+      menu = new UI.Menu()
       $.on $('.menu-button', ThreadWatcher.dialog), 'click', (e) ->
         menu.toggle e, @, ThreadWatcher
       @addHeaderMenuEntry()
-      @addMenuEntries()
+      @addMenuEntries menu
 
     addHeaderMenuEntry: ->
       return if g.VIEW isnt 'thread'
       entryEl = $.el 'a',
         href: 'javascript:;'
-      $.event 'AddMenuEntry',
-        type: 'header'
+      Header.menu.addEntry
         el: entryEl
         order: 60
       $.on entryEl, 'click', -> ThreadWatcher.toggle g.threads["#{g.BOARD}.#{g.THREADID}"]
@@ -228,14 +226,13 @@ ThreadWatcher =
         $.rmClass  entryEl, rmClass
         entryEl.textContent = text
 
-    addMenuEntries: ->
+    addMenuEntries: (menu) ->
       entries = []
 
       # `Open all` entry
       entries.push
         cb: ThreadWatcher.cb.openAll
         entry:
-          type: 'thread watcher'
           el: $.el 'a',
             textContent: 'Open all threads'
         refresh: -> (if ThreadWatcher.list.firstElementChild then $.rmClass else $.addClass) @el, 'disabled'
@@ -244,7 +241,6 @@ ThreadWatcher =
       entries.push
         cb: ThreadWatcher.cb.checkThreads
         entry:
-          type: 'thread watcher'
           el: $.el 'a',
             textContent: 'Check 404\'d threads'
         refresh: -> (if $('div:not(.dead-thread)', ThreadWatcher.list) then $.rmClass else $.addClass) @el, 'disabled'
@@ -253,7 +249,6 @@ ThreadWatcher =
       entries.push
         cb: ThreadWatcher.cb.pruneDeads
         entry:
-          type: 'thread watcher'
           el: $.el 'a',
             textContent: 'Prune 404\'d threads'
         refresh: -> (if $('.dead-thread', ThreadWatcher.list) then $.rmClass else $.addClass) @el, 'disabled'
@@ -264,7 +259,6 @@ ThreadWatcher =
         subEntries.push @createSubEntry name, conf[1]
       entries.push
         entry:
-          type: 'thread watcher'
           el: $.el 'span',
             textContent: 'Settings'
           subEntries: subEntries
@@ -273,7 +267,7 @@ ThreadWatcher =
         entry.el.href = 'javascript:;' if entry.el.nodeName is 'A'
         $.on entry.el, 'click', cb if cb
         @refreshers.push refresh.bind entry if refresh
-        $.event 'AddMenuEntry', entry
+        menu.addEntry entry
       return
     createSubEntry: (name, desc) ->
       entry =
diff --git a/src/Monitoring/Unread.coffee b/src/Monitoring/Unread.coffee
index 08a1d476b..cf0d580f0 100644
--- a/src/Monitoring/Unread.coffee
+++ b/src/Monitoring/Unread.coffee
@@ -107,7 +107,7 @@ Unread =
     if e.detail[404]
       Unread.update()
     else
-      Unread.addPosts e.detail.newPosts
+      Unread.addPosts e.detail.newPosts.map (fullID) -> g.posts[fullID]
 
   readSinglePost: (post) ->
     return if (i = Unread.posts.indexOf post) is -1
diff --git a/src/Posting/QR.coffee b/src/Posting/QR.coffee
index 158968ef7..c8f6bca8e 100644
--- a/src/Posting/QR.coffee
+++ b/src/Posting/QR.coffee
@@ -29,11 +29,6 @@ QR =
       QR.nodes.com.focus()
     Header.addShortcut sc, 2
 
-    $.on d, 'QRGetSelectedPost', ({detail: cb}) ->
-      cb QR.selected
-    $.on d, 'QRAddPreSubmitHook', ({detail: cb}) ->
-      QR.preSubmitHooks.push cb
-
     <% if (type === 'crx') { %>
     $.on d, 'paste',              QR.paste
     <% } %>
@@ -384,9 +379,8 @@ QR =
 
     # Create a custom event when the QR dialog is first initialized.
     # Use it to extend the QR's functionalities, or for XTRM RICE.
-    $.event 'QRDialogCreation', null, dialog
+    $.event 'QRDialogCreation'
 
-  preSubmitHooks: []
   submit: (e) ->
     e?.preventDefault()
 
@@ -419,9 +413,6 @@ QR =
       err = 'No file selected.'
     else if post.file and thread.fileLimit
       err = 'Max limit of image replies has been reached.'
-    else for hook in QR.preSubmitHooks
-      if err = hook post, thread
-        break
 
     if QR.captcha.isEnabled and !err
       {challenge, response} = QR.captcha.getOne()
@@ -562,17 +553,17 @@ QR =
 
     QR.db.set
       boardID: g.BOARD.ID
-      threadID: threadID
-      postID: postID
+      threadID
+      postID
       val: true
 
     # Post/upload confirmed as successful.
     $.event 'QRPostSuccessful', {
-      board: g.BOARD
+      boardID: g.BOARD.ID
       threadID
       postID
     }
-    $.event 'QRPostSuccessful_', {threadID, postID}
+    $.event 'QRPostSuccessful_', {boardID: g.BOARD.ID, threadID, postID}
 
     # Enable auto-posting if we have stuff left to post, disable it otherwise.
     postsCount = QR.posts.length - 1
diff --git a/src/Posting/QR.post.coffee b/src/Posting/QR.post.coffee
index 84826cf94..374447e19 100644
--- a/src/Posting/QR.post.coffee
+++ b/src/Posting/QR.post.coffee
@@ -109,7 +109,6 @@ QR.post = class
     rectList = @nodes.el.parentNode.getBoundingClientRect()
     @nodes.el.parentNode.scrollLeft += rectEl.left + rectEl.width/2 - rectList.left - rectList.width/2
     @load()
-    $.event 'QRPostSelection', @
   load: ->
     # Load this post's values.
     for name in ['thread', 'name', 'email', 'sub', 'com', 'filename', 'flag']