daniledi on "[Plugin: Contact Form 7] Failure when using post title with an EN dash in subject"

We encountered a strange problem:

We insert via hidden filed the post title into the subject line of the message.
When title contains a "EN Dash" (which is a longer "–" ) the request fails.
When replacing it with a "normal" short dash ( - ) - it works.
Anybody else noticed the problem?
Is there a fix?

Thank you

http://wordpress.org/plugins/contact-form-7/