I had that guess too, but unfortunatelly that's not the reason, both computers have Bullzip as default printer. (I installed the same bullzip version in both computers).

Another thing that I notice is when I create the same document using Word 2003 and open that document in Word 2007 (Microsoft Office 2007 Proffessional Plus ) it looks fine, but when I opened it using Word 2007 (Microsoft Office standar) the image again change position, then I used the option convert and I checked the properties of the image vertical and horizontal position had changed.