This content has been modified by another user, changes cannot be saved.

Issue Link: 
http://drupal.org/node/394694
criticality: 
Minor
Drupal7: 
Open
Task: 
Post some example content
This happened to: 
Participant 6

If you edit some content, save it, then use the back button to edit it again, you get this message - even though you're the same person.

Solution: 
Re-word it to explain exactly what's going on.