Yeap I get this Error twice or more everday. I also PM'ed Nevermore about this proble, he read it but did not reply. However, one of my friends told me that the problem is with your browser (Whatever you may be using - Mozzila FireFox, IE, Safari, etc) and not the site.
I think I'm using Internet Explore 7. But I thought that was good?
Actually IE is one of the least secure browsers out there.
Firefox 3 is one of the most secure, but it still suffers from massive memory leaks, which means a computer with a small amount of ram can be overwhelmed by extensive Firefox sessions.
On the topic at hand, that message appears most often, as Pwiz once told me, when your message gets blocked by the site's anti-hacking scripts. It seems to me that this symbol: ' when used around a word (like 'this' ), is the most common cause of this error. Try to use " instead.
It happens to me randomly.