I know, I saw you logged off earlier and I didn't want to leave it in the base form as I've promoted it quite a bit and didn't want a visitor to see it that way.
Just tried the suggestions in your last two replies with the basic wysiwyg editor... same error, I'm afraid.
However, since my last post I implemented a workaround to fit the advanced editor in my layout. Just some tweaking in the quickcom, comments and uploadproduct templates to move the label column at the left of the editor (and in one case, on the right) to a row above it and added the appropriate colspans. That moved the editor to the left, plus I added 50 pixels to the site width and got the advanced editor to fit. The only potential issue is you can still grab the right-bottom corner of the editor to resize it... including to the right so it goes under the sidebar. Any way to disable resizing it that you know of?
So the basic editor error is a mystery, but I'm good. Thanks!