A large number of vehicle colors were changed in the SAMP 0.3x update. For those of you who didn't know, any color from ID 128 and above was a "hidden color" and wasn't stable, it would appear different to people looking at a vehicle at the same time. In 0.3x, those "hidden colors" were changed to be stable and permanent. You can find them here: http://wiki.sa-mp.com/wiki/Color_ID tl;dr Some of your vehicles may have different colors now. It's not a bug.