Went to install redshirt, all went well, install time roughtly 30 minutes.
Then went to install Tribble; seemed to hang at roughly 67% for a long time, clicked about a bit; and started reinstalling from 0%, with no time saved for the run through to the 67% we were at.
Caught my eye, so clicked out of the whole update process. Started again, and sure enough, despite the fact the patcher had already spent an hour 'updating' tribble to the ~67%; reopeneing the installer started it at 0%.