This has been present for a few Betas, since at least 27. When I have a scrolling game with quick backdrops, they stretch and skew like this:
These pictures should give you a good idea of what I'm talking about.
I've found that it's to do with scrolling - when the left edge of the quick backdrop is in view, it looks perfect, but once the left edge disappears off of the left hand side of the screen it begins to stretch and skew, getting wider and more distorted the further across you scroll.
I'm using Samsung Galaxy Tab 8.9 with Android Honeycomb 3.2 by the way. The app is low res (currently 240x160) scaling up with smooth scaling disabled.