See here: http://stackoverflow.com/questions/1461819/ <-- This question has been deleted.
The question was edited so that the title and body were blank.
As Brandon points out, this was accomplished by editing the question to all spaces. I suggest we start enforcing the character limit (by ignoring white space). I agree that the 15 character limit for comments is a nuissance, so I also suggest this be shortened (maybe all the way to 1 character).
This bug has already been documented. However, I believe the question I referenced above demonstrates a unique effect of this bug so I wouldn't consider this post to be a dupe.