With Irrlicht 0.9 :

With Irrlicht 1.0.10 :

I compiled both libraries with the same parameters and didn't touch my code, just the linking. Any suggestions or ideas ? Note that I scale the level by 0.1. It seems the textures are 10x or 100x too big. However, I don't know why the floor on the left is completely lava/red. You will also notice that the lightmaps have disappeared.
OpenGL, Linux Gentoo, Nvidia driver 7174, gcc version 3.3.5-20050130
I will stick to 0.9 for the moment.