Ric,
No need to feel silly at all! If anything, I'm a bit embarrassed that I hadn't noticed this effect before. I usually run the aquarium with "Economize video memory" turned off (the default), but I spend enough time testing out the various settings that I should have seen that (especially since I spent a lot of time working on porting the starfish, in particular!). Once you narrowed it down to the NoZBuffer flag, it was easy to reproduce it and explain how/why it occurred (what setting to change).
Please let us know of an other oddities you encounter or any ideas you have for enhancements/improvements. We always welcome feedback!
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