Reply to Mac Terminator above:

Sure, I've seen Window Manager peak to 60% and more on many occasions with different applications.

The problem that others and I are experiencing is this: with LimeWire running, you launch some other application [even something simple like System Preferences], and Window Manager jumps to 60-90% and stays there. Sometimes it will settle down after 5, 10, or even 15 minutes and sometimes it won't. Totally inconsistant which makes the problem even harder to identify.

Just out of couriosity: how large is your Shared folder and is it physically on your Systems disk?