diff --git a/src/Archive/Redirect.coffee b/src/Archive/Redirect.coffee
index 390312af3..3e4ef732e 100644
--- a/src/Archive/Redirect.coffee
+++ b/src/Archive/Redirect.coffee
@@ -5,21 +5,6 @@ Redirect =
   file:   {}
 
   init: ->
-    try
-      Conf['archives'].length
-    catch err
-      # XXX I get obscure reports of:
-      #   "Redirect" initialization crashed. TypeError: Cannot read property 'length' of undefined
-      # comming from here.
-      Main.logError
-        message: "XXX Conf['archives'].length still failing"
-        error: new Error """
-        Conf['archives'] === #{JSON.stringify Conf['archives']}
-        """
-      Conf['archives'] = Redirect.archives
-      $.delete ['archives', 'lastarchivecheck']
-    Redirect.update()
-
     for boardID, data of Conf['selectedArchives']
       for type, uid of data
         for archive in Conf['archives']
diff --git a/src/Filtering/Filter.coffee b/src/Filtering/Filter.coffee
index dac5df378..8ac6e18c9 100644
--- a/src/Filtering/Filter.coffee
+++ b/src/Filtering/Filter.coffee
@@ -5,16 +5,6 @@ Filter =
 
     for key of Config.filter
       @filters[key] = []
-      if Conf[key] is undefined
-        # XXX hopefully tmp fix for the rare people getting this mysterious error:
-        #   "Filter" initialization crashed. TypeError: Cannot call method 'split' of undefined
-        Main.logError
-          message: 'XXX some filters are still undefined'
-          error: new Error """
-          Conf[#{key}] === undefined
-          """
-        $.delete key
-        continue
       for filter in Conf[key].split '\n'
         continue if filter[0] is '#'
 
diff --git a/src/General/DataBoard.coffee b/src/General/DataBoard.coffee
index 510bf9335..1fa9f742f 100644
--- a/src/General/DataBoard.coffee
+++ b/src/General/DataBoard.coffee
@@ -57,18 +57,7 @@ class DataBoard
 
   clean: ->
     for boardID, val of @data.boards
-      # XXX tmp fix for users that had the `null`
-      # value for a board with the Unread features:
-      if typeof @data.boards[boardID] isnt 'object'
-        Main.logError
-          message: 'XXX weird DataBoard values'
-          error: new Error """
-          @key === #{@key}
-          @data.boards[#{boardID}] === #{@data.boards[boardID]}
-          """
-        delete @data.boards[boardID]
-      else
-        @deleteIfEmpty {boardID}
+      @deleteIfEmpty {boardID}
 
     now = Date.now()
     if (@data.lastChecked or 0) < now - 2 * $.HOUR
diff --git a/src/General/Header.coffee b/src/General/Header.coffee
index e826a9bb5..d873adf0f 100644
--- a/src/General/Header.coffee
+++ b/src/General/Header.coffee
@@ -100,12 +100,6 @@ Header =
         innerHTML: '<a href=javascript:;> - </a>'
       $.on btn, 'click', Header.toggleBoardList
       $.add fullBoardList, btn
-    else
-      Main.logError
-        message: "Header crash: nav is null"
-        error: new Error """
-        #{$$('body > .desktop').map((el) -> el.id).join ','}
-        """
 
     Header.setCustomNav      Conf['Custom Board Navigation']
     Header.generateBoardList Conf['boardnav']