Comment 3 for bug 280236

I've experienced this today while doing a "partial upgrade". Pressing ctrl-C in the update manager will show a warning and mention that canceling now may leave the system in a "broken state", although actually confirming the dialog does nothing.

To be sure-- does anybody know if this is freezing after packages are already "cleaned up", or will killing / restarting indeed cause some problems? Any idea for a general fix/workaround?