The first note on security sandboxes. Security sandboxes have tripped up plenty of people, so this is well-trodden ground. This afternoon I ran into error 2123. The scene of the crimeA certain list flash page needed to support gravatar avatars (gravatar’s cross-domain policy file lives at http://www.gravatar.com/avatar/crossdomain.xml). While loading the avatars they serve up, I hit a security sandbox violation, with this error: SecurityError: Error #2123: Security sandbox violation: