Check out this entry from Steve Rindsberg's PPT FAQ:
Flipped images, upside-down images
http://www.rdpslides.com/pptfaq/FAQ00719.htm

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Kathryn Jacobs, Microsoft MVP PowerPoint and OneNote
Author of Kathy Jacobs on PowerPoint - Available now from Holy Macro! Books
Get PowerPoint and OneNote information at www.onppt.com
I believe life is meant to be lived. But:
if we live without making a difference, it makes no difference that we lived
>I have an old PowerPoint presentation that I am trying to update in
> PowerPoint 2003. However, all of the charts and tables appear in mirror
> image. Is there a fix for this?