Browser problem.(All browsers across users)

Question

Hi,
I have a really annoying problem through all browsers I have installed(Chrome, Firefox 5 and Safari), and I really have tried so much to fix it.
Basically the problems are with examples...
http://www.avforums.com/forums/index.php - on this site nothing happens when I click login/sign up in the corner or when i use search, it's all glitched.
http://www.fileserve.com/file/h7PVh6Y/3DTotal-Lighting.La.Ruelle.3ds.Max.MentalR ay%26VRay.by_instantloader.rar - here I can't click on log in again, the countdown doesn't start when I try free downloader and other buttons do nothing also.
last example
http://www.geocaching.com/ - where it says enter your postal, location, etc...that stays when it should just disappear when i go to type in it, and when I do get my location typed it won't search anyway.
so any ideas whats the problem here? none of these are issues on my macbook, just the imac, really irritating. i think it could be some java thing i have to delete somewhere, but i can't find it, someone told me to go /library/caches but nothing was there anyway
cheers guys

Answer 1

I didn't have any problems with those sites with Snow Leopard v10.6.7 / Safari 5.0.5 or Firefox 3.6.6.
When you experience problems with multiple browsers on more then one user account, it's time to check the startup disk.
From your admin account, launch Disk Utility. /Applications/Utilities.
Select MacintoshHD in the panel on the left then select the FirstAid tab.
Click: Verify Disk  (not Verify Disk Permissions). If the startup disk needs repairing, follow the instructions for Using Disk Utility to verify or repair disks