Fix unwanted captcha loads.

src/Posting/QR.captcha.coffee

@@ -29,6 +29,7 @@ QR.captcha =
 
   shouldFocus: false
   timeouts: {}
+  postsCount: 0
 
   occupied: ->
     {container} = @nodes
@@ -37,9 +38,12 @@ QR.captcha =
   needed: ->
     captchaCount = @captchas.length
     captchaCount++ if @occupied()
-    postsCount = QR.posts.length
-    postsCount = 0 if postsCount is 1 and !Conf['Auto-load captcha'] and !QR.posts[0].com and !QR.posts[0].file
-    captchaCount < postsCount
+    @postsCount = QR.posts.length
+    @postsCount = 0 if @postsCount is 1 and !Conf['Auto-load captcha'] and !QR.posts[0].com and !QR.posts[0].file
+    captchaCount < @postsCount
+
+  onPostChange: ->
+    @setup() if @postsCount is 0
 
   toggle: ->
     if @occupied()

src/Posting/QR.post.coffee

@@ -37,7 +37,6 @@ QR.post = class
 
     prev = QR.posts[QR.posts.length - 1]
     QR.posts.push @
-    QR.captcha.setup()
     @nodes.spoiler.checked = @spoiler = if prev and Conf['Remember Spoiler']
       prev.spoiler
     else
@@ -70,6 +69,8 @@ QR.post = class
       @load() if QR.selected is @ # load persona
     @select() if select
     @unlock()
+    # Post count temporarily off by 1 when called from QR.post.rm
+    $.queueTask -> QR.captcha.setup()
 
   rm: ->
     @delete()
@@ -132,7 +133,7 @@ QR.post = class
         QR.status()
       when 'com'
         @nodes.span.textContent = @com
-        QR.captcha.setup()
+        QR.captcha.onPostChange()
         QR.characterCount()
         # Disable auto-posting if you're typing in the first post
         # during the last 5 seconds of the cooldown.
@@ -161,7 +162,7 @@ QR.post = class
     @filename = file.name
     @filesize = $.bytesToString file.size
     @nodes.label.hidden = false if QR.spoiler
-    QR.captcha.setup()
+    QR.captcha.onPostChange()
     URL.revokeObjectURL @URL
     if @ is QR.selected
       @showFileData()