For anyone that comes up against Permissions, particularly relating to the Home and Applications folder in OSX, repairing them with Disk Utility doesn't work.
Best fix is
Reboot with Command + R
That'll boot up the Utilities
From there, you can select Terminal from the pulldown menu
Type resetpassword (don't panic, you're not going to do that)
Then, at the bottom of that dialog, there's a button for Repairing Permissions. Hit that, wait for it to complete.
Then make sure that you've followed the uninstall options if you've run the beta, then install again..
Should work.
Al