I log in. I check the latest front page news. I open up a new tab. I surf on over to Engadget to check out all the tech news, and not just Touch. I spend around 10-15 min there. Then I come back to my iPTF tab, refresh the forums page to see if there's any interesting threads been made, and alas, I have been logged out. This has been happening a lot lately. Anyone know the reason? And yes, my cookies are enabled.