I have just installed mchat but for some reason it looks perfect in google chrome and completely off alignment and in the centre and overflowing on the board in firefox. can anyone help please I been trying to get this working for 3 days, need help 
oh and I read on one help topic someone suggested to edit mchat.css
and change the divpanel settings and remove the text-align; center;
tried this and didn’t work
There is a LOT of CSS issues between IE and FF. Mostly the way you use "text-align; center; "…
Some of it is just adding it in multiple areas. Sometimes you need to add it to sub-DIV’s. It is ignored
by some browsers. Also, you must not delete your DOCtype. It seems if you do, it will totally change
the way the browser displays the CSS… Here are some sites that talk about the differences…
Hope this helps!
http://webdesign.about.com/od/internetexplorer/a/aa082906.htm
http://www.bleepingcomputer.com/forums/topic362845.html
(In this one, there is a “validator” down a bit that will allow you to check your code to see if there are issues.
Good luck…