Custom avatars not shown in Activity Stream

The custom avatar from JIRA does not seem to display in the activity stream.

Additional Information

Steps to Replicate

1. Upload a custom avatar
2. Change the base URL into ip base URL (example: 192.168.1.1:8080)
3. View profile from Firefox version 20.0 and above
4. Noticed that the activity stream fails to load the custom avatar and revert back to the default or system avatars
   

• It only affects Firefox (version 20)