Deleting To Dos from Mail can also delete from Life Balance
If you are running Leopard, there are To Do reminders in your Mail program. I found out, much to my surprise, that if you delete those from Mail, then do an iCal/Life Balance sync, the tasks you deleted from Mail will be deleted from iCal and Life Balance. Since this deletion may not happen right away if you don't sync iCal very often you might not notice the connection with the Mail deletions. In other words, watch out when you delete To Do Reminders from the Mail program on Leopard! You can be deleting those tasks from everywhere - Mail, iCal, and Life Balance!
The Reminders in the Mail program should be treated with caution and respect and not deleted en masse (which is what I did) (leading to restorations via Time Machine) (another good reason to back up your data frequently).
