Every time I opened a Word document (or tried to create one) using a content type in SharePoint 2013 that had a managed metadata column and the document information panel was displayed, Word would crash.
This was happening on both my Windows 8.1 Lenovo Yoga that has Office 2010 and Office 2013 and My Windows 7 Dell D830 that has Office 2010. Both of these machine had SharePoint Designer 2013 installed on them, in addition to SPD 2007 and SPD 2010.
I found this post from L.L that seemed to address my problem. It appears that running an office repair fixes the issue. Yay!
I guess the last one you repair (Office 2013 or Office 2010) is the one that gets registered as the default application. Which is okay by me, because I am constantly annoyed by the ditching of skeuomorphism and replacement of flat design found within Office 2013.
Keywords: Office 2010, Office 2013, SharePoint 2013, Managed metadata, Content types, Crash, MS Word 2010, MS Word 2013.