Battle.net

I don't know if this is specific toward my computer but I have an iMac with OS Lion. When using Safari and logging onto Starcraft2.com, specifically to look at the forums and post comments, I keep getting logged out every time I switch a page. I do not have this problem with Diablo3.com, nor on my roommates MacPro that runs OS Snow Leopard (currently using).

Before I'm advised to download another Internet Explorer, I'll just say I refuse. I'm advised to download portals so I can play the old Blizzard games that do not work on OS Lion and dozens of other softwares and I'm done downloading crap that causes more lag issues with Diablo 3 and Starcraft 2.

It would be nice not to have to log onto my roommates computer to make a post on Starcraft 2 broadcasts and forums so any help will be appreciated. Thanks!