Well you got this response posted so I'm not sure whats up. I contacted DanF about it and we will see what we can figure out.
Actual, concise, error messages or exact steps you took to get the problem would help a lot.
Are you getting the error trying to reply to a story, post a story or reply to a comment to a story?
The only way I can reproduce it [so far] is using " " in the subject of a reply so I'm lost as to why you have the problem and no one else has seen it without the "quotes".
Cheers.
TomW