I'm having a couple of issues that I did not have in 11.04 or 10.10. The first issue involves connecting to my bluetooth headset. I am able to successfully pair and connect to my Samsung headset for the first time. But as soon as I turn off the headset and later try to reconnect, I'm not able to reconnect the headset. When I try to activate the connection from the settings dialog, the switch toggle back and forth automatically between on and off and never reconnects. I should mention that I had no issues with the 11.10 beta version using the same exact headset.
I have no issues connecting to my bluetooth mouse on the same laptop. However, when I disconnect the bluetooth mouse, the trackpad is not automatically re-enabled. I have to log out and log back in to re-enable the trackpad after disconnecting the bluetooth mouse.
I'm using 11.10 with all the latest patches.