My 2.4 with OS X was 'quitting unexpectedly' sporadically for a while, but tonight it was crashing every two minutes or so. In frustration I went to this forum and disabled the ultrapeer option as suggested. (Limewire pulldown menu>preferences ((which gives you a box called 'options'))>speed. Check disable ultrapeer box.)) I restarted LW immediately and it's been stable for 30 minutes or so. I'll report back in a day or so as to whether this was a coincidence or not. Thanks to the poster who offered this workaround. How did you figure it out?