I've run into this, too--Linux is Mint 17.3 Rosa 64-bit.
Please advise soonest when new opt-in beta is available. Will be glad to test it for you!
(Noted other problems, particularly with "Enable Climate" producing incomprehensible results, and some planets cannot be modified (e.g., add water, organics), temperatures don't modify they way they should, changing planetary (semi-major access) can have unpredictable results, etc.)