[7.7.1] OpenGL

Hi,

I am having issues with OpenGL in 7.7.1.

When I "do it" on "OpenGL.Lessons.Lesson03UniformVectors open" in a 7.7 image it works, but when I do it in a 7.7.1 image I've got an exception: 'OpenGL Error: 1280 INVALID_ENUM' raised by:
varyings := Array new: (gl GetIntegerv: gl MAX_VERTEX_VARYING_COMPONENTS_EXT)

My graphic card has OpenGL 2.1.2

Thanks