Can confirm - upgraded from 8.04 to Intrepid Alpha 6. In 8.04 it worked fine, now in Alpha 6 presents the Log out dialogue, not the shut down one. (see attachment, running gnome not kde!).
I filed a bug report which turned out to be a duplicate of this, here: https://bugs.launchpad.net/ubuntu/+bug/274420
Can confirm - upgraded from 8.04 to Intrepid Alpha 6. In 8.04 it worked fine, now in Alpha 6 presents the Log out dialogue, not the shut down one. (see attachment, running gnome not kde!).
I filed a bug report which turned out to be a duplicate of this, here: https:/ /bugs.launchpad .net/ubuntu/ +bug/274420