DHTML Controls don't work on IE 5 ?!

Since the installation of IE 5 all DHTML Controls give an error when the script of the HTML code of the DHTML control tries to access a method of the control using "window.external.<method>".

This problem can be reproduced very easily by creating a new DHTML control with the ATL Object Wizard and trying it out in IE 5. Once you click at one of the buttons you get a "Object doesn't support this property or method" error.

The problem occurs with all DHTML controls I know.

Has anybody encountered the same problem and found a workaround for it?