Answered
Hi
I am using acrobat 9 standard on windows 7 with the desktop resolution set to 96 dpi (default)
if i make a word document with a text box 1 inch across, and i zoom to 100% in word, the text box appears 96 pixels across (pretty obvious so far)
Now, if I convert it to PDF and then view the PDF at 100%, the text box takes up 110 pixels
so is 100% zoom in acrobat actually 115%? I can't think of any other solution