The WYSIWYG editor seems to be broken...?
The same thing happens to me, in firefox, but only in the user help section of the forums. It works in every other forum. Also, this issue started for the first time after viewing this thread and is reoccurring post-browser restart.
Forum>Counter-Strike>User Help:
0011 proof 0.JPG
Forum>General>Discussions:
0011 proof 2.JPG
It is still broken for me, still only in the User Help section.