I am using Privateer Gemini Gold 1.02 on Linux (Ubuntu 7.04 x86).
In my version, there are three planets in the Ragnarok system - "Jump to Perry", "Mjolnir", and "Jump to Blockade Point Alpha". I assume that there is to be an asteroid field around both "Mjolnir" and "Jump to Blockade Point Alpha".
On my machine, two of the three planets in the Ragnarok system - "Mjolnir" and "Jump to Blockade Point Alpha" - had "AFieldBasePriv" surrounding them, making it impossible to select the planets from the map. Also, "Mjolnir" had no visible planet texture (ordinarily this would be clouds).
I found some typographical errors in ragnarok.system. Now the Ragnarok system works as it assume it should on my machine.
I have included the fixed .system file. I have screen shots but they are too large to be uploaded to this tracker.
I am unsure, though, whether Mjolnir's lack of texture is a bug or a feature. I am lead to believe it is a bug since the original .system file has an <atmosphere> radius smaller than the planet.
revised .system file