My good old Ultimo showed the following issues (it was recently flashed with RC6.1):
1- Using the online flash (for flashing today's build) resluted in ending OFGWRITE in only a couple of seconds while announcing it succeeded. Obviously it didn't, as flashing takes more then just a few seconds.
2- After flashing the normal way (via USB) I accepted the message 'do you want to restore settings', which it did, but the box also installed all previously installed plugins. I was expecting a dedicated 'do you want to install plugins'.