The error has been reported - but as far as I know it hasn't been replicated - not enough people have provided enough information to track down the circumstances in which it arises.
So - if you could report on which version of LimeWire, which version of windows and which version of Java you are using - it might help in tracking down the problem.
I have seen it suggested that the new Java 1.4.1 (see the LimeWire download page for a link) fixes the problem - but I don't know for certain since no-one with the problem has said so (to my knowledge).
Mark |