I had the Audya a year and I moving around every few days.And I got the init phrase error every 10-20 start ups.Maybe the story of hard drive is write.It make sense.
I don't use the registration at all.But I switch a lot of styles when playing simply with the tempo lock and audya was never freeze in the stage.When you switch the registration when playing it's a lot of more data to load so maybe the hard drive is to slow.