Comment 2 for bug 1260915

I was able to reproduce this problem on my system. I was running an older Grizzly DevStack and tried to update the system to the newer release. I found that some files e.g. /etc/keystone/keystone.conf caused problems as they were not update/removed by the installation script. I did not debug this problem further. I created a new Ubuntu 12.04 machine and everything worked fine.