QUOTE  "Isn't it an optional setting in IE whether or not you get those alerts? Maybe BDC has his set for `warn' and the rest of you don't.  I can't recall what the default flag on that is (haven't used IE in a long time)."

In the IE menu, look at Tools>Internet Options>Advanced, then scroll down to "security" and there's a checkbox for "Warn about invalid site certificates".