I've adapted the first tutorial project (Hello World) and built a Sokoban game using that as a starting place. I've replaced the initial model loading and texture assigning with my own models exported from Blender, using PNG textures I made in Gimp. Most of my models look fine except for the player model (a little cartoon bulldozer) which instead of rendering as yellow it looks brown. Can anyone shed any light as to why? I'll attach the texture itself and a screenshot from within Irrlicht below. Incidentally I'm using the OpenGL rendering mode, and I've experimented with the Gamma values in the PNG, and I get the same problem, with or without gamma values.
Weirdly, I just tried converting the PNG to BMP and JPG with Paint and both times it seemed to lose the UV mapping! It had the same dark orange/brown colouring but was all the same colour.