Radio Buttons Not Working In Sharepoint 2007 Form Services Forms with IE9 Beta

It seems that radio buttons on forms displayed/rendered with SharePoint 2007 Infopath Forms Services are not working properly.

We have some internal custom forms on our SharePoint 2007 farm that are provided via InfoPath Forms Services. After I upgraded to the recently release Internet Explorer 9 Beta I could no longer select a radio button displayed on an InfoPath Form Services form.

Guess we'll need to file a bug on this one.