diff --git a/CHANGELOG.md b/CHANGELOG.md
index bfafcd66a..6911baf8f 100755
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 ### v1.9.1.1 
 *2014-09-01*
 
+Based on v1.9.0.6.
+
 **ccd0**
 - Better fix for the bug pushing the QR's captcha response line offscreen. Previous fix caused problems with comment field resizing.
 
@@ -14,6 +16,12 @@ Although not done using this workaround, 4chan X also requests HTTP content from
 - Start GIF/WebM files from the beginning when re-opened via inlining or hover view. Inlining a GIF/WebM that you are already watching via hover view does not restart it.
 - Fix a bug that sometimes caused the QR's captcha response line to be pushed offscreen when a captcha was loaded.
 
+### v1.9.0.7 
+*2014-09-01*
+
+**ccd0**
+- Work around false 404s from 4chan's JSON API by checking the catalog to confirm thread death.
+
 ### v1.9.0.6 
 *2014-08-31*
 
diff --git a/src/Monitoring/ThreadUpdater.coffee b/src/Monitoring/ThreadUpdater.coffee
index 8e02ce74a..17c124f18 100755
--- a/src/Monitoring/ThreadUpdater.coffee
+++ b/src/Monitoring/ThreadUpdater.coffee
@@ -139,17 +139,25 @@ ThreadUpdater =
           else
             ThreadUpdater.setInterval()
         when 404
-          g.DEAD = true
-          ThreadUpdater.set 'status', '404', 'warning'
-          ThreadUpdater.kill()
+          # XXX workaround for 4chan sending false 404s
+          $.ajax "//a.4cdn.org/#{ThreadUpdater.thread.board}/catalog.json", onloadend: ->
+            if @status is 200
+              confirmed = true
+              for page in @response
+                for thread in page.threads
+                  if thread.no is ThreadUpdater.thread.ID
+                    confirmed = false
+                    break
+            else
+              confirmed = false
+            if confirmed
+              g.DEAD = true
+              ThreadUpdater.set 'status', '404', 'warning'
+              ThreadUpdater.kill()
+            else
+              ThreadUpdater.error req
         else
-          ThreadUpdater.outdateCount++
-          ThreadUpdater.setInterval()
-          [text, klass] = if req.status is 304
-            [null, null]
-          else
-            ["#{req.statusText} (#{req.status})", 'warning']
-          ThreadUpdater.set 'status', text, klass
+          ThreadUpdater.error req
 
       if ThreadUpdater.postID
         ThreadUpdater.cb.checkpost()
@@ -162,6 +170,15 @@ ThreadUpdater =
       404: true
       threadID: ThreadUpdater.thread.fullID
 
+  error: (req) ->
+    ThreadUpdater.outdateCount++
+    ThreadUpdater.setInterval()
+    [text, klass] = if req.status is 304
+      [null, null]
+    else
+      ["#{req.statusText} (#{req.status})", 'warning']
+    ThreadUpdater.set 'status', text, klass
+
   setInterval: ->
     i   = ThreadUpdater.interval + 1