Cufon, Drupal and Internet Explorer 9
It's been a while since anyone at our shop has implemented Cufon on a site, but we just recently noticed that some of our older sites weren't rendering anything where Cufon text should have been in Internet Explorer 9.
After a little research, I came across this thread on Drupal.org.
You'll find the file you need to replace in the js directory of the Cufon module, which is most often located at sites/all/modules/cufon/js.
If you need to test the changes to be sure Cufon is working correctly but don't have access to a computer running Windows 7/IE9, check out this great net renderer.