If you are getting the 'Could not move to library' error...

This error is usually due to illegal characters in the filename of the downloaded file. Often this is '\' where the file is listed with a partial path but other (less obvious) characters can do it too.

There is also a fairly rare bug that causes nearly all new downloads to have this problem - shutting down and restarting LimeWire seems to fix this.

In neither case have you actually wasted a download - although the progress bar jumps to 100%, the download didn't get a chance to start.

Mark