Facebook on a MacBook has hundreds of glitches

I've just recently created a new profile on Facebook and can't get it to work properly, which is driving me crazy!
Basically, nothing stays the same on it when I change or update the information: profile picture (thumbnail different to the main pic, or even 2 different thumbnails), pictures disappearing and reappearing, info (once it shows, once it doesn't), friends, account & privacy settings (verify your e-mail like a million times), wall posts, notifications (same notifications over and over), etc. Everytime I click on anything it reverts to the old information, then click again, it suddenly changes to the new (or not), and then back to the old, so I have no idea what actually everybody else is seeing.
I'm running all the latest software: Snow Leopard 10.6.7, the latest Flash and Java, and the latest web browsers. Tried it in Safari 5.0.4, Firefox 4 and Chrome. Same story. Cleared cache, temp files, history. Doesn't work. Closed the profile and opened a new one 2 weeks later. Again, same story. Tried it on someone else's iMac. Same story.
But then I tried Facebook on an old and tired Dell and everything worked like a breeze. Just did what I was telling it to do. It seems there are only problems with Macs.
Any help is very much appreciated.
Thank you.

Hi,
Quit Safari.
Open Keychain Access (Applications/Utilities) Select Passwords on the left.
Delete the Facebook keychain. If you can't find it, type in facebook in the search field top right corner of the window.
Reopen Safari. From the menu bar click Safari/Preferences then select the Security tab. Click: Show Cookies. Delete all Facebook cookies. You can type in facebook there also, click Remove All
Empty the Safari cache either from the menu bar, click Safari / Empty Cache or Option + Command + E on your keyboard.
Go to Facebook. Login as you normally do with your user name and password. You should be prompted to save that data, click Yes. That will create a new keychain for you.
If you still encounter problems, go back to Safari / Preferences then select the Extensions tab. If you have any installed, turn that off, try Facebook.
Carolyn
Message was edited by: Carolyn

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