Happens in 2.1 beta, when you load lots of different maps (/map dm1 /map dm2 ..........) after some time you will get crash with error:
GL_LoadTexture: numgltextures == MAX_GLTEXTURES
I'm trying to reproduce in Linux 64bit but I can't. I have loaded all dm1-dm6 plus all episode maps after eachother, and then repeated loading dm1-6 and other maps but no success in making it fail.
2.2 alpha build 3353 (Built May 2nd)