glClearColor(0.3f, 0.5f, 0.8f, 1.0f);
Please use the latest nightly build. Those are as stable as the "stable" version and mostly receive recent fixes. And additionally, with the nightly versions you always stay close to the API as they will be when the final release of 3.0 happens. Also please checkout the latest update to the demo. I used a debug context. Maybe that will print out some GL errors.EDIT: Ah, that was probably a mistake in the vertex shader. Surprising how lenient and forgiving and non-standard-conformant Nvidia drivers can be...
Are there any libraries out there that play well with LWJGL 3 for creating some primitive geometries (i.e. cubes, spheres, etc...)?