No.

But I am having a problem with Firefox 2 on some sites when I click on a pop-up and it doesn't open a new window, it just opens a new tab but sizes the entire Firefox window to the size of the pop-up.

This happens on www.dodge.ca and I think one or two others.

I'm also having more rendering problems on more sites than the old Firefox. Quite often I have to switch rendering engines (IE Tabs add-on) to get a site to render properly.