Captivate 4 - Exit Button Not Working in Browser

Greetings, all.

I recently upgraded to Captivate 4, and the Exit button on the playbar of published CP4 simulations no longer works when running in IE6.  If I launch just the SWF file in the stand-alone Flash Player, it works fine.  In the browser, it does nothing.  Also, if I set the Project End Options to "Close Project" the same thing happens.  And, if I create my own exit button using either Execute Javascript or an Advanced Action, both will work in the stand alone player, but not in the browser.  Any help you may be able to provide will be greatly appreciated.  Thanks!

Frederic