A number of users have reported an issue in which subjects are missing from messages in Mail.app after the update to Mac OS X 10.6.4.
Fix
This problem can generally be fixed via the following process:
- Launch Terminal.app (go to Spotlight in the upper-right corner of the screen and type “Terminal”)
- At the command prompt, type: defaults delete com.apple.mail TableColumns then press return.
- Quit and relaunch Mail.app
Feedback? info@appletoolbox.com.





March 28, 2011 at 5:29 AM
Thank you, my subject field went missing after uninstalling Letterbox/WideMail extensions.
June 23, 2011 at 4:28 AM
Thanks, works after screwing of the subject post WideMail install
A