I have an Error in my BT Client in not Familiar with ?

I dont know if anyone else has come across this one ,

"Scrape Error: BDecoder: Zero Length File"

I use Azureus , and i tried resetting my passkey and redownloading the torrent but same problem

It seems to download data and upload too.

I downloaded 4 torrents all from the same tracker and they all do it ?

i then tried adding the same torrent file to uTorrent and its seems ok there.

Does this mean theres a problem with the tracker ?
Or is there a setting i have missed that resolves this error ?