I've noticed several threads with this type of error... mine included. I had a previous version of Limewire already installed, and even with it already installed, it gave me this error upon starting up the app. I'm running OS X 10.1.5, with Java 2.5.5. Since I update quite often, I'm not certain when limewire became dysfunctional. I'm hoping for some type of response. I've uninstalled, re-downloaded, no luck. By the way, limewire works fine in 9.2.2. if anyone has an answer to this error message, please respond! thank you