No problems here
Im running Lion on a Mac Book Pro. When I first started it up, I got the starting-but-never-loaded problem, but I also had another modified wallpaper app running. Stopped that and restarted Desktop Aquarium. No problem.
Be aware that it cannot run on top of other 3D desktops (I was hoping to combine this with Dolphins Lite, but no such luck.) Also, if you use standard Apple desktop to change your background every X seconds, Desktop Aquarium will just use a plain background. It must use a static background.
But it is beautifully rendered, with lots of options. You can limit the number of fish, select specific breeds, etc. I got my moneys worth. Ive got the max number/variety of fish, highest resolution, and its not running hot enough for the fan to be audible. (17% of CPU).
vjdjr about Desktop Aquarium 3D LIVE Wallpaper & ScreenSaver