I've stepped in the infamous issue "RED X instead of graphics". Yes, I
red the whole faq entry (http://www.rdpslides.com/pptfaq/FAQ00064.htm)
but I still was unable to find any solution.

Briefly, I have a PPT 2003 presentation which contains charts pasted
directly from Excel. Some are pasted as pictures and some are not (when
pasting you got a dialog box and you have to choose between these two
methods). Well, everything works smoothly when I'm logged as
Administrator" or Power User" privileges BUT when I'm logged as User
(it's our new company policy, that's why:
http://nonadmin.editme.com/WhyNonAdmin) I just see white frames with a
red X in the corner instead of excel charts.

This issue is not limited to a single PPT presentation: on this PC, if
you are just logged as User, you simply can't paste charts directy from
Excel, even on new presentations ... and you can't see those charts if
they are already in a presentation prepared somewhere else.

As a workaround, I can save the charts as pictures on disk and then
insert it in the presentation, but I have a lot of PPT presentation done
the other way...

I was not able to reproduce this issue on others PC. I reinstalled
Office 2003 again, without results. Now, I have a huge amount of PPT
presentation with charts pasted directly from excel and before having to
reinstall the whole PC from scratch, I'm kindly asking for some
suggestions...

Thanks.