My system was working perfectly including colour roms for ACDC, AFM, T2 and Jurassic Park with the following:
Sam3.0, Visual Pinball 10.4, Freezy 1.7.0, 3 screen setup with a virtual DMD (Old PC Monitor)
I wanted to install Pinup popper and the install instructions say to use freezy 1.6 and then update to 1.7 after the install. So I removed the Freezy 1.7 DMD files and installed 1.6. Tested it and it worked ok.
I also went ahead and installed VP10.5, after the install it tested OK.
Then I went and installed VPinMame3.1. Did the usual, unblock dll's run the install, setup defaults etc etc. Tested a table, all ok.
When I was using a test table after each install it was AFM which is one of my colour roms. I could see colours but I didn't realise after each test that it wasn't quite right. Only after completing all the upgrades and playing a full game did I realise that the colours are all wrong on the DMD. The DMD is still colour but it seems to be missing parts here and there. It worked perfectly on before I upgraded.
My install of VP isn't from the all in one installer, It is an install I have had going for a few years and I just keep upgrading it to the latest build. Have not had any problems up until now.