It is the download that is corrupt - not (necessarily) the source(s). LimeWire can download files from multiple sources - sometimes these different sources have slightly different versions of the same file - where LimeWire detects that the sources are not identical it reports a corrupt file (since it will have already downloaded from the sources).

For video and music files, corruption frequently is not too important or can be fixed. For executable files and compressed files, corruption is usually fatal and the file should be junked.

The detection of corruption comes at the end of a download - As soon as the psychic extension for Java is available - then LimeWire will predict ahead of time what will become corrupt and avoid downloading it.

Mark