+2  A: 

Is text rendering any different? Might be that you have zoomed the page in FF (or IE)?

Can try Ctrl-0 to reset zoom sizing (works in both), I have a logitech mouse with a free spinning wheel, so this happens to me quite a bit when I forget the scroll wheel is still spinning and hit the Ctrl key. Plenty other places where the zoom etc could be set.

Could also be something entirely different, but generally I find that IE and FF render images much the same.

Wouldn't call the box fubar based on that, more likely a software setting somewhere... but hey, it's nearly Christmas, and if you want an excuse for a new box, I won't tell anyone :)

seanb
+4  A: 

I just created a composite image of screenshots of the Google image in IE, Firefox & Chrome and they're all in perfect register (top 2 images at 30% opacity).

I believe it has to be a custom zoom you've got set in one of your browsers. Check IE's zoom at the right of the status bar, for example.

composite image

Mike Scott
It turns out to be an issue with FF3 and a bug in either the server 2008 x64 build or the zoom plugin. Tried several combos with varying results but bottom line life is better now. Thanks.
keithwarren7
Which zoom plugin? I'm curious which it is, FF3 or the plugin. Have you tried uninstalling the plugin?
Mike Scott