Today one of my user system made April fool to us. We have newly setup 10giAS instance with WNA Kerberose on our 188.8.131.52 Application Instance. This user was not able to get the Apps home page whenever he clicks the URL. He gets the SSO login page, which he should not get. I looked at sso log files and couldn't retrieve any information about his session. I thought of two choices, one to reboot his system if it works then no need for other. If doesn't I will ask him to login to some other system and try.
Once he rebooted his system and tried login again it works. I am not sure of cause but took it lightly too, thought system made April fool of us !!!
Happy Troubleshooting !!!