We have two Panasonic AG-HPX 500's. The one camera is about a year old and we found on both of them a "yellow/green" tint to the image when shooting on preset daylight.

If anyone knows about this problem please advice.

That is how many of the Panny come pre-set. They are always a little on the green side of white.

If you have a lens with CAC function this doesn't seem to be a problem. However if you use any other lenses the presets are green/yellow. Panasonic here in the US has a fix for this problem.