i have the same problems in 32Bit version of 6.0.7
http://www.hamburg-sounddesign.de/Nuendo/1.jpg
http://www.hamburg-sounddesign.de/Nuendo/2.jpg
MacPro 2010, 2,8 Ghz Quad, 6GB RAM, Nuendo 6.0.x
it´s not so cool if you earn your money with Soundediting and your DAW is Buggy