Yeah, the reason both problems are happening may be the same. What that reason is, I don't know. LimeWire's reporting that it's unable to create a new thread, and FireFox may also be running into the same problem (but handling it less gracefully). Fortunately (for LimeWire, atleast) we've spent the past month+ working on reducing the number of extra threads needed for the program to run. The next beta should be using a single thread for all connections, downloads, maybe uploads, and a host of other things.