It seems that trying to X out of the FO window after your empire has been eliminated causes FO to crash (not that that really affects its functionality...)
freeorion or freeoriond?
Ships created with some owner specified by Source.Owner are incorrectly described by the autogenerated descriptions as having "no owner and no species".
There are lots of bugs with the autogenerated descriptions. I'm not too concerned.
Edit: On a related note, just thought I'd point out that the documentation for CreateShip doesn't list the parameter "species".
Feel free to add it?
Edit2: Specifying "Source.Owner Source.Species" causes the effects description to correctly say that it will be owned by sources owner empire and manned by the source's species, however specifying "0 Source.Species" yields the same effects as just specifying "Source.Owner".
If there's no empire 0, then it will attempt to look up that empire, find none, and leave the name description text empty. It will then test if the name or species description texts are empty, and if either are, it will default to the simple description, which presently says no owner and no species.