I developed an excel file with multiple commandbuttons using Excel
2000. It has worked fine on every computer I've used to view it. A
friend just bought a new computer with Office 2003 and when opening the
file, I get a "File Error: Data may have been lost", the commandbuttons
do not appear and excel goes into some repair mode. After which, I've
lost most of the formating, all the buttons, and all of the images
(which also run macros upon clicking).

Any ideas??