The same thing happened to me last night — using newest version of WordPress, upgraded a couple of weeks ago, everything working fine, and I suddenly found myself in an endless loop of login screens. I’m using Firefox. Another WordPress user at my website is having the same problem.
I have tried deleting cookies and clearing cache, logging in with IE, and renaming my plugin file; nothing has worked so far.
The front page and comments work fine.
Any suggestions?
