Time Machine’s Hidden Local Backup!
 

See http://macgroup.org/blog/2012/02/06/...hidden-backup/
Terry White seems to think SuperDuper! is not fully compatible with Lion's hidden local backup. Any comments from Lion users or Shirt Pocket?

Sometimes, the .MobileBackups folder is in an uncopyable state. There are many solutions to deal with this:

• Repair the source volume (which will often fix the snapshot problem)
  
• Temporarily turn Time Machine off using its preference pane (which will clear the .MobileBackups folder)
  
• Force a Time Machine backup to occur (which should clear the snapshot as well by moving it to the 'real' backup)
  
• Disable local backups (if you don't want them)
  
• Ignore the .MobileBackups folder entirely with a copy script

We'd hoped that .MobileBackups would be copyable in most cases based on our testing, but unfortunately in the broader community (beyond our test group) problems occurred more often than we'd hoped due to the way Apple manages this pseudo-drive (it's really quite weird internally). Given that, we're not going to copy the local snapshot folder in the next update.

I experience this very same error:(