This is the first time I've encountered a software bug that cannot be fixed by restart. Apple's signature quality seems all on the hardware front but software is getting sloppy. I am using a 3rd gen iPad and running iOS6 with the new App Store. Whenever you tap on an app a small window pops up and you have "details, ratings related" When I tap on an app under the "purchase" page, that entire bar is transparent and missing. I have attached a screen below (note, no resetting of the ipad or restarting worked at all)
This seems to be an App Store issue. I am unsurprised there is a flitch, given Apple just recently redesigned it. I am sure Apple would appreciate knowing about this bug in their app. May I suggest you contact Apple support (http://www.apple.com/support/) and let them know? Marilyn