DIG: Palette problem

Sometimes the palette is displayed wrong:

- The blue energy source under the Nexus: it's center glow is
either black or the same color as the suits.

- The first glass door to the control room: like the blue energy
source the colour is like the suits.

- Some of the trams have a pure red "glow". This glow isn't
translucent. Other trams have the blueish translucent glow.
The tram at the orange spire is one of the which is displayed
wrong.

- The tram animations when a tram arrives at a station: the
lightest color blue is substituted with black. When the plank
extends the color is corrected.

I use Scummvm 0.2.2 CVS built on Oct. 26 2002 using a
Debian Linux system. English talkie version of The Dig.