Safari 5, and it ended up doing it on a few others, but mainly yahoo right when I go to check my mail. i doubt its yahoo as it works fine on my phone and works fine on google chrome. Safari 5 seems to be slower now with whatever was just updated. Ends up doing the spinning beach ball and can't click anything. Had a bunch of tabs last time open I was using for business, now i have to find and try to remember what each one was since Safari doesn't restore tabs on a crash??? (other browsers will)
I'm new to macs but not liking safari at all, I mean google chrome is way faster and on video sites loads vids faster without buffering issues safari seems to have.... safari mobile rocks and imo is the best mobile browser so not sure whats up with normal safari.