Have you added any fonts lately?
A corrupt font can cause all sorts of problems
Thanks for the response guys but
I have never added a font.
The crazy part is this started out
of the blue yesterday and I have
made quite a few movies lately
with no problems until this.
Well, if it is not a font, then I would roll back with a System Restore. Do a manual System Restore Point for now, and then boot to Safe Mode. Choose a Restore Point, back when things worked for you. Test.
Also, note that fonts are often installed with various programs, and the user is often totally unaware of the installation.