Yep, and can't upgrade from the test sd25 to the official. Not sure if the official works for anyone yet, as no reports of being able to load it on the seagate forums. I would wait until further positive reviews.
Something else must have changed as they are preparing anew package for install. If everything was the same, why have everybody upgrade???
I had the impression it was more double checking the final version by the testers before making the general announcement.
But if the build number of the prerelease and the release is the same, they shouldn't make a new version, otherwise anybody could install SD25 over SD25.
Not fully correct, it is not QC related. It is the Sandy Bridge that makes the difference, because the 13" doesn't have a QC but has the Sandy Bridge and needs the special build.