PowerPoint Viewer 2007 is adjusting slides

I own Office Professional 2007. I have created presentations in PowerPoint 2007. My layout is 16:9 instead of 4:3. This has worked great until recently. When I try to share the presentation with another user who needs to user the PowerPoint Viewer 2007, the viewer rearranges the layout of the slide and doesn't display it properly.

According to Microsoft's website, the viewer should display any presentation created in PowerPoint 2007. Any tips? Microsoft is no help.