[UPDATE: Ignore this post. It was a false alarm. See the following post for details.]
The version of Arq that I just shipped has a bug which may cause it to drop old backup versions.
To everyone who already downloaded it, I sincerely apologize, and I’m working nonstop to fix it. I recommend you re-install version 1.3.11 by downloading it from here: http://www.haystacksoftware.com/arq/Arq_1.3.11.zip
You’ll need to stop Arq and Arq Agent, unzip the zip file and overwrite your Arq.app.
I reverted the main download link on the web site to point to 1.3.11 for the time being.
Again, I apologize, and I’ll write more as soon as it’s fixed.
- Stefan