Not sure, but this might be relevant:
Margins are wrong, printout is off-center, can't print to edge, printing is
cut off
http://www.pptfaq.com/FAQ00097.htm

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>I have a slide with graphics from SmartArt (flow chart) as well as other
> shapes (arrows & connectors) that I've added. When I print, some of the
> items have shifted a little. It looks fine on the slide as well as in
> print
> preview. Does this mean it's my printer? Help! Thank you.