OpenGL NVidia black window

A very strange bug I discovered in the NVidia OpenGL driver. A program of mine run fine with AMD, but with NVidia it showed a black screen.

OpenGL program's must bind a VertexArray in NVidia.

So, in the initialization do:

GLuint meuk;

glGenVertexArrays(1,&meuk);

glBindVertexArray(meuk);

glBindVertexArray(0);

In every RenderScene, do:

glBindVertexArray(meuk);