I'm running the latest version on an XP machine using a comcast cable service and I tend to leave the program running for 6+ hours at a time. I've been having the following intermittent problems. 1. sometimes it will show several files downloading, all at 0kps. Hours later nothing has changed. 2. I've been having problems getting the program to shut down. Often I will have a box with a animated bar saying that it is shutting down, but the box never goes away...even if I restart limewire and begin downloading.