I just upgraded a Mac to the latest OS X (went from 10.2.x to 10.4.x) and switched the user to Apple Mail. When you compose a new message, it does wacky things when you type. Specifically, it seems to switch windows. You type one letter and the email window is no longer active. You have to click in the window again to type the next letter.
Any ideas what is wrong?
Any ideas how to fix it?