No, we do have a problem. I just ran some quick tests. When you add a planetsize smaller than tiny, there is a wierd side effect. In the system types file that regulates randomly generated systems almost all planets are the size of "any", meaning a random selection. However, in some cases the planet size is specified as "huge", and then some moons are placed in the same sector. (Apparently Malfador didn't grow up om the same planet as the rest of us and thinks moons only orbit Huge planets.
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Anyway, if you add a planetsize smaller than tiny, then any where you specify "huge" as the planet size you get a null planet. That is, something is there, but it's unusable, and has no image. Very strange. If you change the entries in the system types file to "Large", or "any", you get planets there.
Geoschmo