I agree it is annoying - but it doesn't happen all the time.

As I understand it, LimeWire wants the original source in order to continue a download. If it can't connect to the original source, it will clear the download and start from a new source (it will use additional sources to swarm the download, but it wants the original source to start the download).

I believe that the implemetation of hashing in an upcoming release will considerably improve this problem if not eliminate it altogether.

Mark