You will still see 'couldn't move to library' errors, when you are trying to download a file with an illegal character in its name (and without sha1 hash), but the error is shown when the download is started and not when it's near finished.

__________________
Morgens ess ich Cornflakes und abends ess ich Brot
Und wenn ich lang genug gelebt hab, dann sterb ich und bin tot

--Fischmob