Deluge 1.2.0 rc3 gives 'error' after hashing a large torrent

[allio]

I have a 65GB torrent of which I've downloaded about 90%. I added the torrent, told it to download where the existing files are, started it in a paused state and forced hashing. The files that are there hash completely, but when it finishes checking (at about 88%) the torrent gets a red 'error' icon and won't start. Trying to resume it, or restarting the deluge daemon, just reverts it to being 0% checked and starting all over again. Seeing it takes about half an hour to hash each time and I've done it four times so far trying to make it work this is getting pretty annoying.

I think this is actually an old problem, I remember getting it when trying to seed a 27GB (complete) torrent on 1.1.6. I did eventually get it working but I don't remember how, and it doesn't seem to be working this time.

[allio]

Ah I'm thick. The error was caused by the usual culprit, permissions. chmod -R 777 on the download directory prevented the error and the torrent is now downloading.

Deluge should probably recover better from this error than starting the hash all over again, though.