You may be right, for I'm no expert...but when I was waiting for PR1.2 OTA upgrade (before it was available on NaviFirm) I went to Settings>Applications> Manage Applications> Update and had a bunch of stuff there to update (Store, Link) but no PR1.2 so when I ran command ap-get upgrade it installed all the ones that were in my Update screen..... So I'm wondering if thats all it ever does, is upgrade installed apps