Apple Mail.app and TimeMachine
I love Leopard! Single best upgrade I have done this year for operating systems. Vista was obviously a waste of time and Gutsy was incremental over Feisty. One thing that I have been throwing my head against the wall with is Mail.app using IMAP Gmail. I screwed up my settings and have gone through deleting the Mail in my Library and Preferences, yet no matter how many times I deleted the settings were still there. I then ran Mail.app from console and sure enough, time machine was automatically restoring the settings. While in any other case this would be great and a huge boost to a home user. A power user it just bugged me. The process is to remove Mail.app backups from your timemachine disk. Just a heads up