My blank window starts with the startup splash (about when the scrolling animation at the bottom should be), but it's not gray or white, it's black. If I reboot and Limewire is the first thing I've started, it's usually ok, but if I've been running a while and have used other apps first, I'll get this blank window (the splash, main window and the hints window). Also, the first time I used it, I left it running overnight and in the morning when I quit the screensaver, I had black, blank window.
I'm using Win98se on an AthlonXP 2400+ with 512mb RAM and NVIDIA GeForce FX5500