Well, if it'll make you feel any better, we are having the same problem. Many attributes which are listed on the HTML editor page are not working when we enter them into our HTML source. We've tried setting, for example, the color, size, width with an "hr" tag. No joy.
We've tried setting the style attribute with the "p" tag. Also, no joy.
Groundspeak should either fix this or change the editor page to not show these attributes as working/supported.
<ben stein>Groundspeak? Groundspeak?</ben stein>