I have a query which I haven't managed to resolve through the US Gov website or the UK Passpost office. My dd's passport was issued in June 2006 before they started to put in the chips. It is machine-readable, but I am not sure if the photograph is digital (the 2 things you need on a passport issued during that year for the visa waiver scheme).
My dd's passport photograph is covered in transparent 'plastic' - when you hold it up against the light you can see a pattern of English roses and a daffodil.
I really want to make sure about this, as someonbe from work was not able to board a plane to the US, because of her passport not fulfilling the visa waiver scheme requirements! Has anyone with a similar looking passport entered the US without problems?