[Tricorder]

Try this, with 1.49 go into the editor and take a 1.49 generated map you saved. Assign a planet with the starting position for player 1 so you know where you are starting, then on another planet in that same system, add the 'ancient ruins unique - we have discovered... ' to one of the planets with the '4' and '0' for the 2 options below. Then start the game and try to colonize that planet and see if you get the Massive Planetary Shielding.

As for ones already found in a 1.49 generated map, does it say 'Ancient Ruins Unique' or that Combat Movement crap? If it is the Combat Movement crap, try to edit the planet and see if that Com. Mov. heading is in the drop down list where the Ancient Ruins headings are.

I don't know, I just don't get it.