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Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

Same problem here.
I'm on Windows 7 64 bit, how bout you?
 
No iCloud + No iPhone 4S + No Firefox = No problems.

I'm STILL enjoying a fast, fun and very reliable experience via Snow Leopard, iPhone 4, iOS 4.3.x,
Dropbox, and my Fast Favorite... Google Chrome 🙂
 
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