I prepared PDF proofs (Commenting enabled) for a 16-page document with 4 dozen anchored FPOs, backmatter for an art book to be printed in Asia. The copy-editor wanted to enter corrections directly in my Windows IDCS4 file using Mac IDCS5.5. I suggested that changing platforms could cause problems because the job uses Type 1 fonts with a 1991 Adobe copyright (I'd have chosen Opentype if only to automate OSF); I also noted issues associated with conversions to IDSC5/5.5 from older versions. My worries were dismissed as groundless. Am I just a worrywort?