Sadly not. On nothing for that matter. I am currently a bit occupied by a few rather important tests I have to focus on. Regarding the backup, if I recall correctly, I sufferd under the same error again. I didn't want to ask a fourth time then, as this seems to be both, a problem not necessarily easy to fix, but also not so severe that I could justify wasting to much of your time on it, as like said before, I currently have little time to really find a reason behind the behaviour.
Luckily, soon the "testing season" is behind me, so I may look into this, as well as a few other projects, again with the necessary focus.
Have a nice day,