If it plays fine, then no. A corruption is due to LW detecting a difference between the downloaded file & the original hash of the file which is the 1st thing you downld even before you have started downlding the physical file. A corruption can be anything as minor as a different id3 tag or description tag or file name, to as severe as missing bits or bytes or corrupted bits/bytes, or there's something else that may mean the download was unsuccessful. For videos & audio files this may be just a minor corruption detected & still playable, so take that into account. However there is also the possibility data was corrupted due to an aggressive firewall not properly configured or line drop outs or an over aggressive anti-virus or anti-spyware or similar utility has damaged it. The corruption may be at your end or theirs.