Palette changes not occurring while DPMS Screen Saver active

I’m not sure if this is by design and simply due to the way the DPMS Screen Saver works on the Pi, but I noticed it last night.

I left Pac-mania running and came back ten minutes later to find the DPMS screen saver had kicked in. On flicking the mouse, Pac-mania was Black & White.

The only possible explanation I could think of was that palette changes weren’t being passed through to GraphicsV, whilst the Screen Saver was active.