I'm not having that problem with LimeWire 1.5 for OS X. It actually works fairly well for me. It will normally crash on my first launch and then work find on the second. It also seems to be very crashable if I'm actually sharing files. I normally use it from behind a NAT router, but I set up the force IP to see how many hits I'd get if I shared some of my media directories. LimeWire will almost certainly crash when sharing like this, but runs hours on end when not sharing. It also maxes my CPU while scanning my folders for files to share. Overall I like 1.5. The Aqua interface is really nice, and the new format is overall smaller and easier to setup (no install, just double click the LimeWire icon).