Never underestimate the importance of a backup! I ran some upgrades to WordPress and all of my dates and times got screwed. I didn’t panic, but I restored a backup of my database, upgraded again, and then re-added all of the missing posts and comments since the last backup.
If I would have backed up right before the upgrade (like I normally do) I would have saved a lot of time. Lesson learned…
Nick Momrik 
Everything is still messed up!!!
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Backup is important! I agree. I use backup tools to save myself from utter panic! I use Genie Timeline 2.1. It is a very easy to use software as it monitors changes to my files and backs it up on its own. check it out, it will save you from future mess -fortunes
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