New
#1
Do not do upgrades!
There are countless reasons not to do an upgrade from a beta OS to a beta OS but people seem to think it's still ok.
I can't stress how bad upgrading these beta versions is. Stop doing it, or risk losing or corrupting our data.
Don't believe me, just ask "cw-kid" over at "thegreenbutton" having all his mp3's corrupted.
It probably didn't end there.
Just get a backup program like Acronis and do an image of your HD then restore from that.
Just for the record, I did a full restore in less than 2 hours. Most of that was just moving things back onto the HD from the image.