roybjr -- Unfortunately you're the only person (except Fiend, above) who has reported this problem to us. We're not able to reproduce it, and hundreds of thousands of people have succesfully ran LimeWire with XP & SP2. We've made dozens of changes in order to address XP/SP2 specifically, in the hopes that rare problems like this will be resolved, but until we're able to reproduce it consistently (in a controlled environment), there is no guarantee we can fix it.

Because this problem appeared out of the blue, it is very likely another program that was installed on the computer around that time caused something to go wrong. We're trying very hard to have LimeWire run smoothly on as many computers as possible, but the unfortunate fact is that there will inevitably be some that we just can't get working, atleast not without some clever and motivated customers who can sleuth down the problem on their computer and present a solution.

Thanks.