Current Git snapshot of ScummVM, English version of the game from a DVD version of ZGI.
After solving the air puzzle (don't ask me for exact steps, I just click until it works), there is a cutscene of a staircase appearing. When the cutscene ends, there is a brief flash of what I believe is the image of one of te constellations from the puzzle. It's only there for a split second, but it looks ugly.
Diff:
Perhaps related, there's also a brief glitch after using the ring near the end of the game. (At least, I assume it's near the end.) See attached savegame.