If I go to this page http://www.google.com/advanced_search?hl=en in Firefox, the whole page is a big link to google.com and I can't use any input box.

Firefox 2 / Windows XP / no extensions

No problems here-Firefox3-Grand Paradiso

Screenshot?

http://img170.imageshack.us/img170/8785/image2ut6.png

Copy of the file: http://ionutalexchitu.googlepages.com/advanced_search.htm

That is weird. It's like they've forgotten a closing </a> tag and table cell (since the layout's messed up too). Still, it's fine for me.

Actually, on comparing the two files it's just some CSS rules which have been missed out:

.t{background:url(images/grad.png) repeat-x bottom; border:1px solid #ebebeb; border-bottom:1px solid #c7c7c7; color:#000; padding:5px 8px 8px}

#logo{display:block; width:150px; height:52px; position:relative; overflow:hidden; margin:15px 0 12px}

Firefox 2 / Windows XP / no extensions > no problem for me

Are you Greasemonkey'ing anything?

same config like Tom with extensions > no problem for me neither

No extension. I can reproduce this in Opera, but not in IE.