It's a precaution to be followed, since the upgrade routine can be changed or behave differently due some necessity.
If you do a backup and nothing is lost during the upgrade, you lose the 10 minutes from the backup.
If you don't do a backup and all important and hard to find documents that you may have stored are lost, you are short of luck.
Last edited by jorlando; 12-13-2010 at 02:48 PM.
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