thanks for the message - hmm… the situation looks pretty bad, unfortunately.
I asked Pierre about it - his response here:
I have no clue of what happened, I didn’t experience any data loss on this server, and the pad was actually one that never complained of anything. (I had other services that complained from time to time, i had to rebuild db and this kind of things)
But in any case, i never lost any data.
In this case, I have to admit, I don’t see the data neither.
We do have backups (every hours for 10 days officially).
I tried to roll back to 7days, 15days, 20days, still the same. (I don’t have backup after 20 days.)
I checked these pads:
without luck.
I am without ideas.
Do you have an idea?
In the mean time, I’ll keep the service off to avoid any further mess (new backup erasing old backup and so on).
Again, I’m really sorry 
You’d be the first one to experience a data loss
but I really don’t see how it did happen…
So as nobody had checked the pads for a while, we weren’t able to spot the problem while we still had up-to-date backups.
It looks like our data is probably gone. Which sucks, obviously.
I’m sorry Maike, we screwed up - we should have had a better backup system in place.
Time to build a better system I guess…