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It did solve our problems with IE 4.x and IE 5.0. There was 
one more thing that we did, but I'm not sure if it really did 
mather. The we removed including the python method 
*base_javascript* from all sources and put the code created 
by that method into a *base_javascript.js* file and changed 
the absolute url in method *help_window* into a relative one 
(not putting the TRACKER_WEB before the *helpurl*). Why? 
Well sometimes did would the popup not appear for some 
instances. With this fix it always appeared.

Best regards,
Marlon