This plugin worked great on my sites (more than 50) until the WP3.2 update and the switch to BackWPup 2.0/2.0.1. Now I have tried to use it on several of the sites and it does not work. I have to abort the backup, and have started switching my sites to another backup plugin. It's a shame, because I really liked the old version. It was much simpler, and totally reliable.
The latest problem I had is trying to use it with a new site, and I get the error Temp Dir Not Writable. I don't know where to find the temp dir to set the permissions correctly. What should the permission be?