Hi Jason, once again you were spot on. Everything is working just as it should now.
For some strange reason, un-checking the 'include unicode signature (BOM)' and 'Saving As' didn't seem to 'take', - (in the Powerstore files this option seems to be 'always on') but opening a new blank page (my Dreamweaver preferences 'New Document' always has the 'Include Unicode Signature' switched off) and copying and pasting in the Products_Details page code then saving that seemed to work. (No idea why!).
So yet again, am grateful for the 'rescue'.