The shutter is quite new and really accurate. I have shot some other pictures with it Saturday (similar f-stops and speeds) and they where as they should be. I do not believe in overnight failors. Yes, sometimes I forget to close the lens before pulling the darkslide but not today evening, I mostly check twice. At home again I checked the meter with an other one immediately, but the meters gave identical values from the greycard.
If you would have been with me out there I think you would be puzzeled too, as I am now. I was a really nice scenery with mild yellow-ish light, the white clouds appeared yellow-ish and the sky was really blue. There was some haze, but not to much. I do not bother with the blue-ish cast of the picture (it should be a bit pink or lilac) but with the overexposure. I can not understand this.
I should go to the West - Monument Valley or so. No haze, warm colours, no problems.