Im having the same problem as well. Except with a little twist. Usually i download music and other files no problem but i've recently tried downloading some videos and encountered these problems.

My problem is, when i start downloading the file it may or may not connect immidiately as usual, and then when it finally does connect it will only go up to 7 or 8 kbps when i've seen speeds >70kbps. Then it will go back down to 0 kbps, and then it will drop it until it re-connects which takes forever.

Anyway, im using LW v4.8.1 through a cable connection, and windows xp pro. I've tried to delete the settings located in .limewire on my hard drive, with no effect. Tried some other things too but nothing has worked, if anyone has any suggestions, im all ears.