Anomalous Editing in Confluence 5.0.3

To reproduce:

• Edit a page
• Make a change
• Click Preview - this should produce a message that your draft has been autosaved (view change) but does not
• Click Cancel
• Click Edit - at the top there is a message that says: A version of this page you were editing at (date and time) was saved as a draft. Do you want to view the change, resume editing or discard it?
  The link for "view the change" does not do anything. See screenshot.

This was observed on 3 instances of Confluence 5.0.3 and on both Firefox and Chrome browsers.