We may want to use auto-update for updating people from 6u10-beta -> 6u10-rc.

auto-update/Patch-in-place was not designed to work between builds, but rather between update releases.

Currently, if we auto-update 6u10-beta users to 6u10-rc, they will be shown the dialog "You already have this version installed, would you like to reinstall?". The fix here should be to supress this dialog during this user scenario.

It should be noted that a full 6u10-rc will be downloaded when users are updated which I believe is around ~11MB. We'll be using the BITS technology to do this in the background. This is also a good idea because we can test out the new auto-update features with a larger audience (before 6u10-fcs).