Dear sir,
I am extremely perplexed by this problem.
It would be awesome if you can repair this document.
Your help would be greatly appreciated.
Here is the link to my file:
http://www.mediafire.com/?uu2whx2nbhwdpoa
You can't imagine how gay I felt the moment I saw what you were doing.
Great job for help so many people. (Hopefully me too :p)
See http://www.mediafire.com/?fbscd0h82sn1uq9 for a fixed version of your document.
The issue was an incorrectly closed oMath element. The problem was in Figure 6 (A geometrical representation of Descartes' analysis). I doubt anything changed, but check carefully.
@Microsoft Support: I hope you people are aware by now that there is a serious flaw in the storing of math equations, especially in combination with graphics. It doesn't take rocket science to fix the documents, so it would be nice to see support actually offering some support in this thread.