Thanks for pointing out it's a Dropbox thing--at first I thought it might be a Chrome problem. Specifically the viewer seems not to use the proper font for this presentation. Preview on Mac OS works fine.

What was worse for me was the font kerning on some things (supposed to be fixed width?) was amazingly atrocious.

I'm kinda impressed though. I don't think I have a program that will view pptx files, so I was happy to be able to read it online.

It's some PPTX -> PDF converter and then it's just pdf.js.