x dialogue box with everyshare

http://eye44.com/telenor-begs-customers-for-funds-but-network-quality-is-shame/

Whenever I click some sharing service, it first bring an empty dialogue box on my screen with just written “x” in it.

My site problem or is it a bug?

http://wordpress.org/plugins/hupso-share-buttons-for-twitter-facebook-google/