LetterBox for Mac OS X 10.6.5
The popular LetterBox plugin for Mac OS X’s Mail app has been updated to be compatible with the release of 10.6.5. Prior to the plugin update, Letterbox required a manual fix for Letterbox to work with Mac OS X 10.6.5. The new version prevents the need for the hack.
If you’re interested, you can head over to the developers site to get the newest version with full 10.6.5 compatibility.