Has anyone worked out what the problem is yet?

I have exactly the same problem. changes from ‘px’ to ‘in’ in checkout and doesn’t provide the download link. Worked fine until I updated recently. Is it possible to roll back to a previous version?

This has made me look stupid in front of clients.

here is a test page to see for yourself. http://polkadotfox.co.uk/galleries/downloadtest/

I look forward to someone saving me.