Registration page "rules box" malformed

[VGPelega]

I have only recently been made aware of this error, but on my website, on the register page, the rules box, breaks out of the frame of the website, and adds a side scroller to the bottom of the web browser.

Not only does this look disgusting, but I also feel it is affecting the users who would register.

Is there anywhere in the register files or templates that I can edit, to set this text box that contains the forums rules, to a smaller width so that it fits into the actual forum template, and does not require the user to scroll to the right and "Off the screen" to read the registration rules?

Will this have something to do with the site using a fixed width theme? (928 pixels)

I hope I have given enough information, with out posting a link, but a link/screenshot can be provided. I am not new to VB, and should be able to easily fix this, if someone just points me in the right direction.