I have the same problem. Up to now I was using Limewire 1.7 with windows me, with no problems. Last week I have reformated my system and installed the new limewire 2.4.4 and this error occurs. My system was clean, no problems at all.
It happens when I close limewire.

Also because of this problem, it seems that some file associations get screwed up. The icons don't represent the files, surely because of the restarts.

Any suggestions?

(Pity because I like the new version so much I was thinking of upgrading to Limewire Pro)