Occasionaly when I save my print as a pdf, the first view I place on the print is missing.  This is annoying, however easy to see and I simply rebuild the model and resave.  Today I was givven a print that was missing some but not all of the baloons.  I have worked for this company nearly a year, and the missing view has happened I would guess a dozen times.  The missing baloons was just today.

Has this happened to anyone else?