Do you have a particular reason for this? A feature that you need from 1.5? Most of the people I know who are users of Adobe Acrobat are still with version 5 which uses PDF 1.4. Only a small number of people have upgraded their Acrobat Reader to version 6. Start time of AR6 is a PITA so I personally love to stick with v5 as long as possible.
One problem I see is that as soon as you state PDF 1.5 in your PDF file you will get warnings in Acrobat versions 5.x. That might annoy some people. I understand that PDF 1.3 is now outdated, but I'd prefer to stay with PDF 1.4 for the time being. On 09.10.2004 03:28:29 Glen Mazza wrote: > Team, > > Which version  of the PDF spec does FOP follow? > Can HEAD use the most recent, version 1.5 from August > 2003? > > Thanks, > Glen > >  http://partners.adobe.com/asn/tech/pdf/specifications.jsp Jeremias Maerki