I have seen this several times over the last few months. I will hit send on a print and come back to see it didn't print a certain color that is in the file. It is always a vector color and the other colors that are in the file print fine. Even more odd was today I ran a print and the first one printed fine. Then just did a reprint (new rip) came back and it left out most of the black in the file but actually did print one black stripe that was in the design. When I aborted the job the preview in PM showed the colors were missing. Closing production manager seems to be the only way to fix this. Anyone see anything like this?