Powerbook: Safari freezing?

Quick question: Last night, my Powerbook started freezing with Safari and Firefox when I go to certain websites like ESPN.com, IGN, Sirius.com, etc.

Does anyone know what this could possibly be? I've restarted, I don't know what else to try.

EDIT: I have emptied the cache and repaired disk permissions, and it's still not working.

Thanks guys.

Fluidmusic00 said:

I fixed the problem by restarting my computer. This worked for me, but doesn't for everyone.

Check out this thread:
http://discussions.apple.com/thread.jspa?threadID=1431695&tstart=0

Click to expand...

Didn't work for me. I've restarted, emptied cache, removed cookies, basically everything, nothing works. I'm sort of confused, because it happens on all Mac's, MBP, MB, PB, iBooks, etc. It's extremely annoying.

I read through that apple thread, but nothing helped.