I can't figure out why this is happening but when I export a PDF from InDesign (CS5) things are changing slightly from what I was seeing in InDesign. Mainly the colors seem to be a bit greyer and the font weight has increased a little (See picture for comparison). Is there a setting in the PDF creation that adjusts this, I'm using the 'High Quality Print' setting when I go to export. Thanks.
Check your color settings in InDesign. They should match the PDF Export settings. It looks like the trim marks in your PDF do not allow for Bleed. You should take a closer look at your PDF setup in InDesign. Try selecting "Leave Color Unchanged" in the PDF settings. At a minimum, the settings should match in both InDesign and the PDF settings.