Anyone reviewing this thread may be interested in the following update involving BackWPup not working after the 3.x.x release. I have really liked this plugin to provide automatic backups of my website, and therefore spent some time trying more experimenting on a test site today (3/19/2013).
Background on my problem:
Version 2.1.17 works fine... no problems and backs up in about 1 minute.
Upgrade to any 3.x.x version gets to creating ZipArchive and just hangs around 70-75% depending on version and other backup settings.
I tried just about every setting I could, and finally found one that seems to be the culprit on my site. The problem in my case appears to be with the ZipArchive compression function. If the plugin is set for "Auto" or "ZipArchive", it tries to make a ZipArchive type of backup and hangs. If changed to PclZip, it works every time in a little less time than the previous version.
To resolve issue with timeout on backups, try this:
• Under "BackWPup" , select "Settings"
• From the "BackWPup Settings" Menu, select "Jobs" tab
• From the Jobs tab, look for "Method for creating ZIParchive" and change to "PclZip"
• Save your settings and try it again
I'm not sure about some of the other new settings, and not sure why the auto select function defaults to ZipArchive since the previous version of BackWPup used PclZip for backups, but my main goal was to make it work. I look forward to the next update and hope it resolves this bug.