Safari 5.1 Win 7 constantly logging me out of websites, WebKit2WebProcess.exe crashes

Finally updated to 5.1 last night, Safari now contantly logs me out of various webistes (gmail, facebook, youtube, google, hotmail, kotaku, ign, gamespot, and practicvally every website that requires log in). Also, some websites (facebook and gmail) keep telling me I have my accept cookies setting tuned off, when it's set on "only from sites I visit", had to set it to "always" before I can log in.

Also, every now and then something called "WebKit2WebProcess.exe" crashes, but it doesn't seem to effect browsing in general. But both of this problems never happened with 5.05, so I thought switching back to 5.05 should solve this.

And it doesn't, switched back to 5.05, then to 5.04 and back to 5.05 again today, only the "WebKit2WebProcess.exe" crashes stopped. Logging out bug now also happens with older versions of Safari. I tried clearing caches, cookies, and resetting Safari, nothing works.

Maybe a separate software essential to Safari thats updated with the 5.1 update, is causing the bug; and reverting back to 5.05 and 5.04 doesn't revert this buggy software? Perhaps its a software that has something to do with cookies?

I HAD TO TYPE THIS POST TWICE, BECAUSE BY THE TIME I FINISHED TYPING THE FIRST TIME AND CLICKED "POST MESSAGE", SAFARI HAD LOGGED ME OUT. WHEN I PRESSED "BACK", THE AUTOSAVE ONLY SAVED HALF OF THE FIRST PARAGRAPH!!! THIS BUG IS NOW DRIVING ME NUTS!!