Cubase 6 graphic hiccup

I just got my C6 update and encountered a little nasty graphic bug on my MacPro HexaCore with OSX 10.6.6.
The Transport bar is not recalled on the same place as before but it even cannot be placed anymore on my second monitor at the same place (low border of the screen). It jumps up a third of the screen. This MacPro has three screens connected, one 30" one 24" and a HD ready TV for playing back QT - usually I work with Nuendo 5. The same projects are graphically correct with Cubase 5 and Nuendo 5, therefore it must be a a problem introduced with Cubase 6. Please correct this! Thanks.

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