By default in Internet Explorer everything is considered dangerous. Users can say to stop warning for all types except core list. A few want to discuss, no one wants to punt. Base spec requires support for UTF-8 but not complex mapping. UTF-8 but these are octets.
Specific order is best.
Sort proposal by names. Unhappy with having server tell client which comparitors are valid in LANG response. Can't have client that detects all comparitors available. Don't want to announce them all in greeting. Error texts and comparitor discovery.