[Mobhack]

Try setting your windows colour scheme to a different one, and see if the same thing happens. If it goes away, it may be something in the windows colour scheme you have set - maybe a custom colour? - but why only that one SHP should have a problem I do not know, I would expect all backgrounds to be the strange colour not just the one.

BTW - I just spun up the windows XP virtual machine for Mobhack (Delphi) development, copied all the SHP files and OOBS to be sure they are current and fired up Mobhack - no funny background for the Cuban P-47. Colour set to the maximum for windows XP (32-bit).

So I surmise that the problem is something local to your machine. No idea what it could be, either.