glCompressedTexImage2D(GL_PROXY_TEXTURE_2D, 0, GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 2048, 2048, 0, 4194304, 0) generates GL_INVALID_ENUM on nVidia 8800 and works properly on AMD 3850.
Same call but with GL_TEXTURE_2D works properly on nVidia too.
Why is this happening?
