The pop up window for control properties does not open when using firefox and clicking the radio buttin or check box buttons. Tried it with doctypes html4.0 & xhtml1.0. Same problem on CE site demo page (used default configuration link). Using FF 1.5.
Also, once the check box or radio button are in the editor, in FF I can't access the properties by doulble clicking or by right clicking.
P.S. Safari & Opera support are nice, but IE & FF are critical. I think FF support has crossed the line from nice to required.