1)how many files are you sharing? Size of the share? (too many could cause memory and threads problems)

2)are you behind a router? (if yes too many connections could cause it to cut the connection and possibly make Lw crash)

3)are you an ultrapeer? (being an ultrapeer could increase chances of getting problems on your 'puter)

4)are you using the LW from limewire.com? (if you are using the Jum's java 1.4 builds, I've found it crashes too much for me, so I'm using the basic .com version)

5)you could always post here the crash logs in the console in the utilities folder.

Bonne chance