i have had the same problem, it doesnt work on my 600 ibook, but does on my sisters 800 ibook... could it have to do with a limit on processor speed? my sis is running 10.2.8 os x, as am i, but i think she may have a slightly older version of limewire (working) on her computer. Maybe we should just all find the older version... or just screw limewire since they dont care about us os x users, and switch to somthing like Acquisition. Its faster, and easier to use, simple, everything. So, limewire, if you would like to keep your users, i suggest you work on this problem....