That's a weird one. Under advanced preferences there are a couple of options about keeping the iTunes window on top of the others that you could make sure are de-selected. Other that that I don't know.
The biggest bug for me is that I have to run iTunes without PM for certain iPod functionalities, and the fact that it displays differently on different machines/displays regardless of the OS. It also won't upsample when I am running AstoundSound, but that's Astound's fault for being limited to 44.1k. Oh and the play button always has the play symbol displayed even when iTunes is paused; the PM scrolling bar says paused though.
The biggest bug for me is that I have to run iTunes without PM for certain iPod functionalities, and the fact that it displays differently on different machines/displays regardless of the OS. It also won't upsample when I am running AstoundSound, but that's Astound's fault for being limited to 44.1k. Oh and the play button always has the play symbol displayed even when iTunes is paused; the PM scrolling bar says paused though.