Ian, your response to the chair sounds like an allergic reaction. Think this may be related to the whole masochism thing. Your body clearly rejects the whole idea of sitting in a comfy chair and demands that you return to your lumpy futon. Seriously though, if you actually felt a constriction in your throat it could be an allergy.
On the Mozilla front, I just moved to version 1.3 beta and the site works okay now. However I would recommend moving to CSS and layers and can provide tools to build the page (and advice on Blogger integration).