I'm having the same problem. I get error type 1 every time I try to launch 2.9.8, which I just installed. I've unistalled Limewire, then installed the MRJ 2.5.5 version that was in this message thread, restarted, increased memory for the Apple Applet Runner, but still I get the same error when launching Limewire. Maybe there is a bug in the software?