A couple of weeks ago I was inquiring about an explanation as to why certain pages that open normally with FF are to large when opened with IE. Yahoo is an example. ScreenShot #1 has been accessed with FF and #2 with IE!
Tools, Internet Options, Accessibility:
Uncheck all three boxes under 'Formatting'.
If they aren't checked, go ahead and check all three, click OK, and OK again, close IE, go right back in and uncheck all three.