This is useful information (in fact you have already printed this exact post in a thread I created before) but it does not specifically answer my question.
Are you implying that the reason for the behavioural inconsistency of the CuteEditor is because of these different ways to set the font size? It would be nice to get a straight answer rather than a paste of some HTML specifications, especially when my question is about the behaviour of the CuteEditor and not HTML.