Comment /Post to Facebook Box Cropped

Hi,

thanks a lot for your plugin – already wrote a review too.
I am just having some issues with facebook: can you please try the recommend button at http://www.mapsmarker.com/get-a-coupon-with-a-like/ – when clicked, the commentbox opens, but is way too small (same issue like in this thread:
http://wordpress.org/support/topic/comment-post-to-facebook-box-cropped?replies=4)

I already tried to figure out which css is causing this but failed.
Any help here would be appreciated!
thx,

Robert

http://wordpress.org/plugins/wplike2get/