Render glitches (5770 and Resolve 9.0.3)

Hi Guys,
I need to render a show on 9.0.3 on a MacPro with a Radeon 5770 and I get random glitches on random shots. Parts of the image turn blue or yellow like in the following image. The glitches never occur at the same place but always on the same clips that somehow involve the saturation control.

The show is 1080i50 in ProRes HQ.

Here is an exemple (the yellow spots). Tell me what you think.

Screen Shot 2012-10-26 at 4.45.17 PM.png (769.22 KiB) Viewed 901 times

So the 5770 is only supported in Mountain Lion.