multisample pixelformat problem

Has anyone experienced issues drawing to the front buffer using a multisample pixel format?

basically …

Do main drawing of scene to back buffer and then swap buffers
2. On mouse move
set the device context
set the front buffer
draw on the front buffer

When I use a multisample pixelformat and set the front buffer it seems to cause the buffers to swap and i see the contents of the back buffer.

I am wondering if this could be an nvidia driver bug as my code works fine on normal pixelformats …

Sounds like a driver bug, but anyway writing directly to the front buffer is not recommended.