If I change the appearance to Nimbus one of the menu items transforms itself to a ghost and is wandering around while navigating through the project hiearchy (see attached video). Other styles don't seem to be affected. The correct set of menu items is visible in the attached picture.
Mac OSX 10.6.1/RM2 Beta 3
Attachment(s):Bildschirmfoto 2009-11-01 um 09.39.52.pdfRubyMineBeta3.mov