go to System preferences/Accounts and click on your name in the LH panel.
In the RH panel, click on the Advanced Tab. Put a check in the box that says "all user to administer this computer" (or words to that effect)
That should fix you up. You may find that the system will ask for a password the next time you try to do something and it will have the other persons name in the name field. Just change it to yours
Hope this helps
I have imacG5, running on 10.3.5. I was signed on as administrator and had just added another user. I set up the second user with password, and was going through the change of password for his keychain. I think this is where I goofed up. System took password for second user that at first was same as mine. Then I changed it to a unique one and was setting up the keychain password when I noticed that I am not administrator anymore. I have standard status. If I go to netinfo, I can input my short name and password and get recognized to do changes there..but I guess that could be for anyone. I have tried authenticating myself with full name, short name etc. to no avail. It gives me the correct hint for the password I am inputting.
So: is there any way for me to correct this (I don't know what I did) besides going back and doing a clean install of the OS? I haven't put any files or new apps on this mac yet.
Thanks in advance for your help!