I am now far less convinced that the use of UTF8 broke my system now. It could quite possibly have been one of the many other forms of abuse I have been throwing at it recently. I really must treat it with a bit more respect. I will experiment a bit more. Wish my luck. I am either very mad or very stupid. Whatever.
Internet Explorer seemed to be handling the pages differently and therefore flipping them over to EUC encoding in the process. Yet another reason for hitting Bill Gates around the face with a wet fish if I ever get to meet him.