As far as I can tell with chat, it looks like you need to be running IE to access it. I have yet to have it work with Netscape/Mozilla.
As far as the SQL error, you are getting that because your username has a ' in it, which is screwing up the passing of your username to the Database for verification.
As far as chat, it might not be perfect, but it is not horrible either.
There is no way that this site would be linked to IRC again (most likely) because of the problems with channels being hijak'd and other situations where people must be immature. I would have liked to try to setup a secure IRC server here on the NG website, but it is forbidden by Shawn's host, and I understand why.
So, the next best option is the PHPmyChat, which is INFINITELY better than any other Java chat seen thus far, and integrates somewhat with the forums.
What I did was hack the program to use the VBulletin cookie each user has to allow them into chat, no cookie, no access.
Chat also has no moderators, so if someone is abusive, since everyone is using their forum name, it is easy to find out who it was.
Also, when you are looking at the main page, you can see who is currently in chat and join them.
I still hope to tweak it some more, but there is very little documentation thus far. I *REALLY* want to get it to work with Netscape, but I have no clue as to what the problem is with it.
Things to hack? Better colors, more smilies, maybe some more options? Hard to say. I just today go onto the support list for the program.
Another plus for this chat is that it is compatible with VB3.0, which we will be upgrading to this winter (when it is FINALLY suppose to be released).
What would be perfect for chat? IRC based, no name changes, using the Forums Database for Username/Password with a direct connection to VBulletin for a 'Whos in Chat' display. But, without having an IRC server here, we have what could be considered the next best thing, I guess.