NvIFr + OpenGL 3.3 = Crash

I’m developping an OpenGl application that use OpenGL 3.3+ (K4000 with driver 353.62 + Windows 7 + SDK 2.3.7).
I want to add a realtime recording feature and NvIfr seems to be a good candidate.
However, I’ve discovered that even the nvIfrOgl_SimpleH264 sample crashes if I set the OpenGL context to 3.3.

Is it a bug or a ‘feature’ ?