since a few months I have the problem described above on my old android tablet (Android 2). A week ago I bought me an new tablet (eee Tablet with Android 4) and have the same issue there. All hints given in this forum (update, development settings) are checked and the issue remains on both devices.
Anyone with an idea? The problem shows up with any pdf-file I have. Switching to the home-display and then switching to the app sometimes helps to render at least the last shown page, but switching to the next page or zoom in or out brings back the problem.