et al:

This morning I ran what was the first large number of packages after upgrading to plucky . . . the GUI "froze" when it hit the "udisk" package at "77%" completion . . . mouse worked, but nothing repsonded to it. Had to shut down using power button. On reboot, went back to plucky, ran apt dist-upgrade again . . . showed "one package" available . . .ran it through and did the usual autoremove/autoclean . . . all that seemed to go well.

Shut it down again, haven't checked it to see if all is again, "well" with plucky . . . ???? It is rare to have this kind of problem with the ubuntu based flavors, even if "alpha" . . . .