This probably fixes the text rendering issue for some people(where random characters where missing). I still think it's a driver bug, relating to GL_COMPRESSED_ALPHA_ARB, which is deprecated in newer OpenGL versions(that's probably why it worked with OpenGL3.3 and not with the older one, because our OGL 3.3 implementation uses GL_COMPRESSED_RED, which replaced the above) To be extra sure, i also looked up the causing function: https://www.khronos.org/registry/OpenGL-Refpages/gl4/ht...