Standard Troubleshooting Procedures for Word X:
See here to make sure you are fully updated:
http://www.mcgimpsey.com/macoffice/office/vxversions.html
Then check for general troubleshooting tips:
http://www.mcgimpsey.com/macoffice/word/troubleshooting.html
In addition to the tips listed there, check your Word Startup Folder
(Applications: Microsoft Office X: Office: Startup) and see whether you have
any add-ins there that may be conflicting with Word (Endnote is a common
culprit).
See especially the part re corrupt fonts.
Please post back and let the newsgroup know what worked, or if you are
posting back because nothing worked, be sure to explain what you already
tried.
This link has a bit more information if you get desperate, but is presented
in a less straightforward manner.
http://word.mvps.org/FAQs/WordMac/index.htm
DM