Gerald,
as Deborah says, the HP quizzes administered by HotPot/QuizPort modules may display slightly differently in IE6, because of the idiosyncratic stylesheets (CSS) implementaiton in IE6, but the functionality of the quiz should be no different from that of the same quiz in standards-compliant browsers.
As always, if anyone reports significant differences with the way HotPot/QuizPort activities display or behave on particular browsers, I will do my best to find a fix or workaround.
regards
Gordon