Update failed on my system. Should have looked at the forum before upgrading.
It killed my ability to run VMs. I did not run it long enough to see if other stuff was not working well.
I reverted to 9.10 (d989edd) - thanks for having that feature btw.
This upgrade, from the sounds of it, was not tested very well. This does not really seem to be something that should be on the "stable" train...