My MacBook Pro just had a system issue which affected Finder window display and IPhoto albums. No amount of tinkering would fix the issues, so I decided that an OS reinstall was in order. After erasing the volume, re-installing 10.6.5 and my files via Migration Assistant, the problem was still there. Aak!.
I finally used iBackup to back up just my core Apple apps: Safari, iCal, Address Book, Mail, and Keychains. These I really wanted to be right, as losing or manually replacing them would be a complete pain. Erased the HD, reinstalled the OS, but did not take up the installer's offer to import my user settings. Basically, the computer was back to factory-new state. Gulped, ran iBackup 'restore', and bingo! All my mail and mailboxes, Safari bookmarks and history, Address Book contacts, and iCal calendars were just the way I had left them before wiping the HD. Very cool. Oh, and the problems that had prompted me to do the clean install were finally gone; everything works properly.
Five stars and a donation to the developer from me!