Ran into an interesting bug just now. Smilies replacing strings of text involving : and \ characters don't work properly. Haven't tested it too thoroughly yet, but does look like an XF bug so far. To reproduce: Create a new smiley. Enable CSS sprite mode for good measure. I'd imagine it happens without it too, though Make the smiley replace the following text: ':\' (without quotation marks) When posting a thread, select the smiley manually through the smiley chooser. The bug doesn't happen when typing :\ out. The smiley will not appear in the editor, but will appear in your post. The result in your post will be something along the lines of: Code: :\" class= Using XF 1.1.