This thread is quite old, but it describes exactly what has been driving me crazy for months with Limewire.

I have a Cube 500 with 512Mb RAM running 10.2.5 and ... an ATI card.

Everytime Limewire runs, I must hide the app to have decent performance. Otherwise, the whole system is sluggish and I mostly see the spinning CD for a mouse cursor.

Anyone has a fix for that ?