I found that I had to make most of the changes to the bitmap to the upper half of it. If the changes are to the lower half, NG doesn't pick it up. Saving it a pixel larger could solve the problem it the bitmap you are working on wasn't already the size of the screen, and if you aren't planning on interchanging the two. Hopefully this is yet another bug that Philips will find and fix rather than either of these poor solutions.