Has anyone tried flashing firmware in the new AS2012 Beta 12?

My new board came with firware 1020, so I've put it in recovery mode, downloaded the latest Beta 12 software and have attempted to update the firmware to 1021 several times now. It takes forever for the green indicator bar to complete (30min?), and each time it doesn't seem to be taking.

Maybe I need to shut down some background tasks or something?