Turns out there's some software incompatability between the Canon driver and Acrobat 7. When she would print the PDF to the Canon, the problem would start and corrupt the driver so it continued to occur on other printers. I wiped the driver and her print prefs, started over and printed to the other printers first, no issues. As soon as she printed to the Canon it occurred again. As the Canon is our copier anyway I redirected her to other printers. The problem is gone as of Acrobat X.