OK. So, how did an old rumor get started up again? Don't just say "I don't know;" try to think of any specific events or circumstances that are concurrent to the rumor's reemergence. Did you get into a fight with someone? Are you working with someone that has shown disdain or otherwise has expressed dislike for you? Was there a recent change in management and/or policy? It's important that you identify the impetus for this vicious behavior.