Run Error when using Alphablending and Vertical Sync

Hi,

Since quite a while now i’ve been having problems with a lot of the more graphically advanced stuff that openframeworks can do. I can run none of the examples in the “gl” folder and the “graphics” folder also gives me trouble.

I have found that disabling ofEnableAlphaBlending and OfVerticalSync often lets not so graphical sketches run without trouble. But when I for example try to run the GPUParticlesystem I run into trouble with the shaders.

Does any of you have any tips on how to resolve this problem?

Thanks in advance.

Ps. I am on a laptop with: Intel i7, AMD Firepro m5950, 8gb of memory and windows 8.