Agree, I got corrupted backup data as well, and DejaDup failed to restore a single file from a directory (but the file was actually backedp up correctly, so I managed to recover it by restoring the WHOLE disk backup on another volume and fetching it from there)

On top of that, also the backup process itself was unbearably slow... I really wanted a backup tool built upon inotify, so now I'm using Crashplan (it's not open source, but at least it works on linux)

It's unfortunately not an exception rather than yet another indication that they need to spend some energy on polishing things and fixing bugs. At least critical one...

Ubuntu is really terrible at that.