I have a customer that is beginning to supply design templates in Quark 5, but they are allowing us to save the files back to Quark 4 in order to commence production. I am curious as to what problems that I may encounter saving these Quark XPress 5 files back to Quark XPress 4. I understand that features such as the Layers in Quark 5 may be lost, but are there any other "less obvious" problems that I may encounter? Thanks in advance for the help!