Commerce add to cart confirmation IE issue

Hi

I'm relatively new to Drupal, I have almost completed my first site with Drupal Commerce (using kickstart).
I'm having a small problem with the add to cart confirmation in IE (gets displayed when you click the add to cart button).

I'm not sure if its got to do with the URLs or the view or just something i have missed.

Problem: IE only - when the add to cart button is clicked IE displays an error page (Internet Explorer cannot display the web page).
I have disabled the module to see if the form that gets displayed was the problem and this did not work.
One thing i did notice is that if i add a trailing slash to the end of the URL and load the page and then click the add to cart button everything works as expected but only once because when the page refreshes it removes the slash and the same error is displayed on the next add to cart button click.

I tested this in different browsers
chrome
opera
Firefox

neither of these have the same issue (sigh).
I did some searching but i have not yet found a similar problem.

Any sort of direction would be greatly appreciated.

Thanks.