Forum update 05/08/06

This may seem sort of crazy and that's because it is, but I looked at some of the code and attempted to clean things up a bit. This is due to seeing a couple of visitor registrations recently. Not sure what's causing them. It did make me check the register script which had some annoying bugs.

- Fixed an issue with the avatar viewer in the register script displaying an error message instead of displaying the avatar.

- Fixed several graphical or layout problems in the register script.

- Many miscellaneous HTML fixes to post, topic, and forums scripts.