dnlklondon

I use a print delivery solution application, QuickPrint, which does the required conversion and validation based on the publications requirements, so I have a workaround. However, QuickPrint is a 'pay for solution', as it does validation, optimisation and delivery . One which I use for all my ad delivery globally. You could simply (only if you're good with applescripting) create a workflow which uses Acrobat to do the conversion.

Yes, 2003 is the updated version, however, UK publishers will reject 2003 version as their systems only allow 2001 - (Yes I know what you're thinking, but that's how it is).

Will the option for PDF/X-1a:2001 (PDF 1.3) be available in the final release of Publisher? In the UK most national and regional newspapers and magazines require PDFs saved to that format. Currently, I'm exporting PDF/X-1a:2003 then using Acrobat to resave to PDF/X-1a:2001.