Randomly when people try to post on my site ( http://www.gamerdevils.com/forums) They are greeted with a erorr that says "Please enter a valid message" while posting, even though they've entered content to be posted. Why is this occurring? is this Xenforo or theme related? I'm a bit at a loss as it's even happened to me from time to time but I can't figure out how to reproduce this error? This has been happening for a bit now, I'm currently on 1.5.10, I believe it started around 1.5.8 or 1.5.7......but I can't be too sure.