Most likely the same problem as in
- Barbie Explorer (video rendering)
Re: End of Twilight (2001) and Barbie Explorer (2002) don't start with dgVoodoo2
- Spirit: Stallion of the Cimarron Forever Free
Spirit: Stallion of the Cimarron Forever Free
- and another one that I can't remember
So, since it's a corruption caused by the OS itself (with DX8 games requiring 16 bit color mode), and the layer causing it cannot be disabled (at least, I couldn't figure it out how), the only solution is to patch the affected games.
If that's possible at all, but that's another story.
You can try disabling 16 bit display modes in dgVoodoo but I doubt it will help because the game probably uses 16 bit mode because it cannot do 32 bit.