[TYPO3-project-formidable] Problem with IE7 and actionlet:REDIRECT

[Mario Rimann]

Hi all

I experience an issue in the Seminar Manager (tx_seminars) which uses 
formidable for the registration process.

There exists an actionlet:REDIRECT entry in the XML that should trigger 
at the end of the registration process and redirect the user to a 
regular page from TYPO3.

So far, this works perfectly for all Firefox (Win, Mac) users and for 
IE6 users as far as I know. But users of Internet Explorer 7 are not 
being redirected.

Is this a known issue with formidable?

Cheers,
Mario