Might as well go all the way to fix this.

CHANGELOG.md

@@ -1,4 +1,4 @@
-- Fix Thread Hiding initialization error, you'll have to clear all hidden threads in the settings window if you keep getting this bug.
+- Fix Thread Hiding initialization error.
 
 # 3.0.0 - *2013-04-07*
 

src/features.coffee

@@ -1097,7 +1097,12 @@ ThreadHiding =
     hiddenThreads = ThreadHiding.db.get
       boardID: g.BOARD.ID
       defaultValue: {}
-    hiddenThreadsOnCatalog = JSON.parse(localStorage.getItem "4chan-hide-t-#{g.BOARD}") or {}
+    # XXX tmp fix
+    try
+      hiddenThreadsOnCatalog = JSON.parse(localStorage.getItem "4chan-hide-t-#{g.BOARD}") or {}
+    catch e
+      localStorage.setItem "4chan-hide-t-#{g.BOARD}", JSON.stringify {}
+      return ThreadHiding.syncCatalog()
 
     # Add threads that were hidden in the catalog.
     for threadID of hiddenThreadsOnCatalog