Thanks chubby, good catch! The streaky light-blue bars in the sky over the right-hand palm tree were the culprit. That cloud bank's picture stops at its top edge (the old 800x600 window never showed that edge), and on bigger windows the game stretched the cloud's top line of pixels up to the top of the screen, which smeared it into vertical stripes. Now the cloud carries on upward as a mirror of itself, so it reads as more cloud instead of stripes. This is live now. Re-test: refresh the game, go to Meet the Parents in Amoria (Mom and Dad's house) on a large window or a high resolution setting, and look at the sky above the right-hand palm tree. Note: the black border around this map on very big windows is expected, because the map is smaller than the screen there.