My mother is having a problem with Mail. She has just upgraded her iMac to Leopard. As far as I can tell (we're nearly 10,500 miles apart) she hasn't had any serious problems. However, in Mail unread messages are not appearing in bold in the Inbox. She has got Display unread messages with bold font ticked in Mail Preferences. Unread messages correctly appear bold in her Junk Mail folder, but not in the Inbox. I was going to suggest that she trash her Mail preferences filecom.apple.mail.plist. Am I correct in thinking that she won't need to reset her account settings if she does that, since they're stored elsewhere? Otherwise, if we have got to redefine the accounts, can we use the existing offline caches that are in her ~/Library/Mail folder? Thanks for everyone's time and help.