I just finally figured out what was causing our Parhelia APVe to "lighten the image" when playing previews with "force YUV" switched on. It would go back dark when pausing.

If you have this card and have been having that type of problem, check the following under your Matrox PowerDesk-HF menu:

Chose "Quality and Performance Settings",

then "Game and 3D settings...",

then turn on "Allow application-specific settings", and on the right side of the menu, click on "Modify".

Scroll down to the bottom, or make your window bigger so you can see all the settings, then made sure the "Use OpenGL overlay" is NOT selected!

When I deselected that option, all the probs went away and now there is very little delay with previews as well. Some how, in trying to find the solution, that had gotten turned on (or was on by default).

Whew! Another now-fixed pain goes away.

While I'm at it, David is there any other settings on that menu that can affect CF under PP3? Such as "use independent back buffers", or "User HUD mode", or some particular "3D anti-aliasing" setting? 10-bit Gigacolor has no effect I can see.

Awesome news. Thanks for this information.

Hmm..I have this same problem however all those boxes were already unchecked...maybe i'll try checking it...

Hmm..I have this same problem however all those boxes were already unchecked...maybe i'll try checking it...

Ben, just to clarify things (no pun intended), I have two digital LCDs running in stretch mode, and "Enable overlay surface" de-selected in the CF menu off the main preview window. I also deselected overlays in "Video Playback settings" of the Matrox Powerdesk HF menu.

My Parhelia is working very nicely now, after a long time of giving me hassles.

Hope this help you somehow. If not, I'll give you the rest of my settings and you can maybe see if there's any difference.