Brian Durant said: >I have suddenly developed a problem with the Mail app quitting >suddenly while I am composing an e-mail. Anyone come across this >before? I am using Tiger on a G5 single. Generally if an application suddenly quits under OS X, the first thing to suspect is a corrupted user preferences file. Try: Preferential Treatment (free) http://homepage.mac.com/jonn8/as/html/pt.html If that doesn't help, I would try manually uninstalling Mail.app's preferences file. Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) Routine OS X Maintenance and Generic Troubleshooting http://www.macattorney.com/ts.html