I have had problems also. Kubuntu installs no problem. Net install/dvd install does not seem to matter. Yesterday the install failed on pluto_orbiter not installing. Today the install finished apparently normally, but after the required reboot the system would start to boot get past the kubuntu splash screen and then spontaneously reboot. I did notice that there was an error connecting to the database. This happened so fast that it took a while to see part of the message. Today I just let it continue to reboot over and over. I walked away and when I came back the avwizard was ready for me to configure it. The setup wizard started a short time later and I was able to configure that part. The only I am having at the moment is getting my micasaverde zwave dongle to start. It is seen but I get an error message saying it can't start and that there is something wrong. I rebooted the machine to see if that corrected the problem and so far things are not going well. The system is starting the interface because a log is starting but the usb port is not being automatically selected and when I select the port i think it is and reload the router it does not stay selected.
This is exactly what happened to me, the core started rebooting a couple of times so I too walked away then when I came back the AVWizard on the core was there. This is different from the previous attempts which continued to reboot with a flash of MySQL problems to fast to document. Anyway, I completed the setup and haven't had any problems since. I don't have micasaverde so I can't weight in on that. I use a Tricklestar so after customizing the template, as usual, I connected the Zwave USB Dongle and it was recognized as it should be.
Both my 1.5TB drives sdb1 and sdc1 with all of my media was also recognized properly. The only little glitch was my second camera, an analog connected to a Bluecherry card, in the core, it caused the Motion Wrapper not to initialize. I setup my Motion Wrapper and added my first camera, a D-Link IP, and all was OK. I then added my second camera, an analog connected to port 1(port 0) on the config, and then I had erratic Motion Wrapper inits after router reloads. This is the same setup I've used for the last year with no problems and no changes to hardware. I then deleted the second camera that I just created, set it up again, and then it worked. Go Figure!
Things get fixed, and other things break... That what Alpha and Beta is. If we can't fix it all we can do is report it and give feedback to help the programmers.