Looks like that made my program run.
Now it says OpenGL version 3.3 on my console again.
...glGenBuffers fails as an unrecognized function though.
Same with glBlendEquationSeparate. My gpu is an AMD Radeon HD 6900 with 4 gigs of dedicated memory so it can't be that. Besides I've used these functions before but outside SFML/wxWidgets