[Roanon]

Originally posted by Thermodyne:
I have not had any java issues, but one of our sites uses popups and they don't pop. Another uses a downloaded controll that I can't duplicate for Firefox.

The popup is possibly blocked by spam control. You should get an icon in the lower right of the Firefox window indicating the blocking of a popup, clicking it and you can enable popups for the current site only. Very nice feature.
The download control might be a non-standard HTML, used only by IE. Bad web design to use it; nothing that can be done about it.