Wordpress Custom Theme and Jetpack Subscription Widget IE 9 Error

We installed and customized a Wordpress Theme for our Client, We also installed the Jetpack Subscriptions Widget for their clients/employee's to follow their blog. In IE9 (and possibly other browsers) the Subsription Widget isn't working properly. It is filled out and when the Subscribe Button is pushed it appears to subscribe the user and submit their email address for a confirmation email. This process works properly in Google's Chrome, but DOESN'T work properly in IE9 and possibly IE8 and possibly other browsers. No Subscription Email ever comes to the client.