Interesting...
Here is what I have found out. When I go to usercp and change my editor to standard, I can post comments without any problems. If I also change it to WYSIWYG editor using the toolbar in the message interface, I can still post the comments, although it locks the toolbar and I can no longer go back to standard unless I refresh the page. Now here is the kicker... When I go to usercp and I make WYSIWYG editor my default editor, I get the "too short" message no matter what I do, so there is an obvious link to what editor is set as default and the error message. I would LOVE to post this in photoplog.com, but I cannot log in at all.
At least I now know what is causing this problem... now if only I could get some help in fixing it.