I found out the hard way this evening that Apple is deprecating the Bezeled style of UISegmentedControls. If you're not doing iOS development then perhaps you have nothing to worry about. Watch out for such changes.
I found this out with Xcode 4.3.3 which at least still draws the style. Xcode 4.5 sets the style to Plain. I'd expect the same for 4.4 also.
Anyway, I now have to recover from this. I think I'll finish my upgrade on the old machine with Xcode 4.2 which will not cause me this headache. I really want to concentrate on getting my upgrade out, not messing with silly little Apple alterations that make zero sense to me.
I couldn't run Xcode 4.3 a week ago. I'm jumping from Snow Leopard and Xcode 4.2, to Mountain Lion and Xcode 4.4, with a brief stint in Lion territory. Oh what fun.