I'm assuming you have run Software Update and are using the latest version of LimeWire . . .
see
http://www.gnutellaforums.com/showth...threadid=36028 for how to get a Console report of the crash
First though, it would better to shut down the computer for a couple of minutes (to clear the memory), then startup holding down the shift key right after the start-up tone ("Safe Boot Mode"). Open the Console, and then LimeWire.
When (if) it crashes, the error report will show up in the Console window, and you can post the key parts here.
As for Panther, I'd wait until Tiger is released shortly