I have been bullied at work and my company are acting very much like yours did "ignorance is bliss".
I have put in an "informal grievance" as that is the proper way they tell me and now i have to face this bully in a mediation service but im scared that they will force me to work with this person if all resolved. There will be no proof if this person does it quietly without anyone hearing.
I have had to fight for the last year since being diagnosed, Human resources even asked me to prove i am disabled.
I understand what you are saying about getting tired and stressed by it all as i am as well.
Your website is brilliant! You are an inspiration please carry on with your excellent work.
Just knowing you have had similar encounters with regards employment helps.
Added: 18th August 2007