cronjobs stopped working

Hello people,
I had these cronjobs scheduled in some Unix boxes which were running fine until yesterday.But then the password was changed for that user id and then the jobs stopped working. As far as i know cron jobs run from super user. I am completely lost over here now.
Thanks.

Each user can have a separate crontab. Did you check that?

Well it ran now. Has this got anything to do with the time the password got changed or expired for that matter?
Also where can I find out if there is a separate crontab enntry for users?