Somehow the records of my Photos folder got "lost" and completely reuploaded, all the incremental are gone. And this was not even after I adopted an old backup, just happened randomly. It reuploaded 15 GB before I saw what was going on. So now my Glacier is about double the size it needed to be.
Support responded and had me send in the logfiles. I looked over the logs and there was nothing helpful there. Sure enough support could not help me and I am left with no solution.
This kind of stuff really makes me wary about the whole software. Strangely enough the other folders did not see the same thing happen.
I should clarify and say support did get me to send various log files, etc. so it wasn't a bad experience at all - it just ended with no solution.
Maybe I'll just take a loss, kill my Arq 3 backups and just re-do everything with the new version!
Am I right in assuming that upgrading/re-imaging an Mac OS X install normally shouldn't result in sync