I just stumbled upon a situation that causes LimeWire to crash within minutes repeatedly. I get the occasional unexpected quit like everybody else, but that is random, and sometimes L W will run for hours or days with no problems other than it slows down the OS to a sticky molassesy crawl.

But today when it happened several times I did not realize that I had Classic running. When I quit Classic, the crashes stopped. It's been running normally for over an hour now.

That might be common knowledge, I'm not sure, but if you've got Classic running you might try quitting it to see if it makes any difference.