Ikrupp . . . . I guess it depends on your definition of "show stopper". You are correct that it is not a show stopper in that I can still walk over to my iTunes machine and select my music. However, when it comes to Remote being a usable App, yes it is a show stopper.
And before you jump back to flaming me, in my usage case (and some others, if you read the entire thread), it is not just a minor annoyance. I primarily use the Remote app to select classical music in my iTunes - and because of a combination of portrait mode chopping off most of the columns, and the Remote app not allowing you to select which columns you can view, and the way music is sorted, the Remote app has gotten pretty well useless. I can sometimes work around it and find what I want, but it's much quicker now to just walk a few rooms over and select what I want.
Is it a life ending event? No. However, just because for your usage patterns its only "mildly annoying" doesn't mean that for other users with different usage patterns and purposes that it's not a show stopper.
And the fact remains that something as simple as screen rotation and non-response buttons should have been caught in QA before release.
Maybe rather than arguing about whether those billions of dollars of cash reserves Apple has should be used for dividends or stock buy back, instead maybe make additional investments in QA and some of these applications.