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We're unfortunately experiencing this as well. There's a reported issue in Unity's issue tracker - go vote! :)
That is awesome news! Go go Unity devs :)
trepan: I'm pretty sure you're aware of this, but just to clarify for any future readers of this thread: The answer to the last question is that...
Yup, same here! Running OSX 10.8.3 with Unity 4.1.3 (worked fine in 4.1.0)