We get most of our files "print ready" but sometimes I have to put in indesign to resize for white borders. Every now and then we get a job where the knockout does not show when pitstop is opened. If I notice it I will have to click on the type and make it overprint/knockout. Sometimes it is something I do not notice and it prints with type missing! I am not sure if it is something in the original document that does not have overprint settings correct or if it is something in my output from indesign, however it does not happen to all type, the knockout at the top of the sheet showed and the line at the bottom did not, which leads me to think that it is not in my indesign output. If I close pitstop the type will show normally. Also putting the file through our Agfa pre-press program did not fix the issue which is surprising. The customer wants to know how to prevent this in the future but I really am unsure where the problem is originating from. Has anyone seen this problem and can you lead me to the right direction in figuring out how this is happening? Thanks for all your expert help!