I must be missing it. I can't find any place within Settings to change my username. Can you give me a link?
From the FAQ:
It is your responsibility to keep the information in your profile up-to-date. You should especially ensure that your email address is kept current. You can alter any of the fields in your profile, except your username. Once you have registered your username, it becomes yours for life. In extreme circumstances, you may request that the administrator change your username, but he or she will require a very good reason to do so.
I'm guessing that you (Chiranjeevi) as an admin have access to capabilities that I as a regular user do not have.
