Of course many advanced users know how to get the updates if store update fails. I think most of the end users rely on the store updates. Many have no clue...
99.9% of times this end users fault(/3rd party app that modifies repositiories), he has enabled developer mode and ****ed up the repositories, and/or installed something from custom repoes that messes up depencies.
I did some debugging on FF, ovi store tries to download 12.0 version of the deb and not the 13.0, and that confuses ovi store client. So someone has fuxored the version numbers...