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10.5.1 is here... and I'm starting to think that Apple isn't going to fix the compatibility for the menubar.

Hopefully in 10.5.2 they'll address UI issues...
 
I have a 20" iMac G5 2.0 GHz with 2.0 GB RAM and 128 MB VRAM on an ATI Radeon 9600.

I get the transparent menu bar all of the time; in some of the Pro apps (i.e. Soundtrack), the transparency (translucency) is reduced significantly.
 
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