The previous huge leak is gone, but I think I have found another. I bring up Parallels in Coherence mode and run Rhapsody ( a subscription music service; there is a free trial/mode if you want to duplicate the leak). While playing music I see the memory grow, not nearly as fast as the old one, but 1 meg every few minutes. The activity monitor under OS X will show all this memory but window's task manager will not. If I kill Rhapsody the memory does not get reclaimed. So, I don't think it is a Rhapsody leak. Since this is an audio app it could be related to delivering audio from windows to OS X, but my gut feeling is that this is a networking leak. The way Rhapsody works (I am a developer working for the company that makes it) is that each time a song begins it will download it at a rate faster then what it plays at, near the end of the song there won't be anything left to download, so there will be no network activity until the next song needs to get pre-fetched. This is exactly what I see the memory doing, going up at the beginning of a song and then not go up at all until about the time the next song is pre-fetched over the network. If this was an audio leak then I would expect to see the leak go up steadily over time since the audio never stops. Anyway, hope this helps, let me know if you want more info. --greg.