Eep... I tried copy-and-paste an html version from SeaMonkey composer page, and got very strange results. Then I said, what the heck, and went ahead and pasted the plain text into the editing window, as if it was the Rich Text Editor. Posted, and... it seemed to work. I thought when I clicked on the Rich Text Editor tab, it put up the tool bar? It's not doing that now, but it actually does seem to work. As Spock would say, "Fascinating." It looks as if I actually had the RTE, I just didn't know it.