I am having the same issue and it's really starting to **** me off!
I've also tried all the things that you have posted, I called apple support but those greedy *** holes want to charge me 19 bucks for help.
Did you by chance recently upgrade the software on your computer?
I upgraded mine maybe 2 weeks ago, I wonder if that has something to do with the problem?
Well, hopefully we can figure this out. I got school work to do.
How do you turn IPv6 off in Safari 5.1.10?
I don't see anyway to do this.
Lately, Safari is not only loading slowly upon initial opening, but it's also slow to load new pages, and it's regularly loosing contact with webpages in previous tabs I opened. I'll go back to a tab, after moving to a new one, only to find it blank, and then I have to reload it, which takes f o r e v e r !
Then I find my entire system get stuck and I can't do anything. Sometimes I can force quit an application and other times not. Many times lately, I find my computer is just frozen and all I can do is reboot it manually to get it working again.