Howdy! Running Vista and having the same connection problems as everyone else. Tried both Limewhacko's suggestion and deleting preferences folder with no result. Have used Limewire successfully with NO INTERRUPTIONS whilst running XP, but since switching to Vista, ability to connect has remained sporadic. Saw a suggestion in this thread that it might be a problem with certain ISPs, but came across the following on another file-sharing site:

"Windows XP service pack 2/Windows Vista users: microsoft has instated a limit on the number of concurrent connection attempts in these versions of windows which may adversely affect the performance of the client."

I'm about as tech-savvy as your average grandma, so I have no idea if this is relevant. Anyone wanna take a stab?