Nothing I'm aware of that would cause problems with macros that analyze pixel
coordinates. Is it moving the shapes based on hardcoded pixel offsets?
....maybe something to do with screen resolution on different machines rather
than XL2007.

Have you tried testing a simple macro to return top and left pixel values
for a given cell in each version? Usually when I create macros like this, I
look for a specific cell to just use as a key location and then set topleft
values accordingly. Then I don't have to worry about changing column widths
or row heights that could muddle things up.

Any rows or columns hidden or resized on one version vs. the other?