Lion restoring windows throws DO NOT HAVE permission
To solve the permission errors, just boot from your recovery cd(insert cd and reboot while holding alt/option) and click in the menubar on 'Utilities' and select 'Disk Utility'. When you are there, you can choose 'repair disk permissions' (get ready for about 2 hours of not being able to use your computer).

In preview, close each document and then quit the app, that should do the trick.