LimeWire is a memory hog. (Or is it the Java?) I've seen it use 100+ MB at a time. When I first upgraded to 2.6.3, I had forgotten to set the memory higher as previous versions usually crashed. I checked the "About this Computer" and it was using 72+MB out of the "73 MB allotted for it". I hadn't set it to that. In the Get Info for LimeWire, it was set to the default which was around 5 MB. Very strange.