System > User Manager - WebCfg - Status: Traffic Graph page
When adding a user and assigning the "WebCfg - Status: Traffic Graph page" permission, the user sees the page but the graph does not display (cannot collect data error). Does not matter if permission is assigned to user or group user belongs to - same result.
Also noticed two identically labeled permissions, WebCfg - Diagnostics: System Activity, although descriptions are different ("Allows access to the 'Diagnostics: Show Bogons' page" and "Allows access to the 'Diagnostics: System Activity' page")
2.0-BETA5 (i386) built on Mon Feb 21 23:20:11 EST 2011
UPDATE - same problem with Feb.23 beta.