Environment
Novell Open Enterprise Server 2 (OES 2) Linux Support Pack 3
Situation
After applying July 2012 maintenance, it was seen that the amount of space used in /usr grew by approximately 410 MB.
Resolution
This is normal and due to FireFox being updated to version 10.x. Firefox also has a commensurate 380MB (or so) of FireFox extensions that are installed as well.