W3C validator error

Hello,
I have found your plugin that is really cool. I love it. But I got n error message on W3C validator because of mail sharing.

Line 185, Column 5284: Bad value for attribute target on element a: Browsing context name must be at least one character long.
…ight:32px;margin:0;margin-bottom:5px;”><img alt=”mail” title=”Email” class=”sy…
Syntax of browsing context name or keyword:
A browsing context name or keyword is either any string that does not start with an underscore (_) or a string that case-insensitively matches one of: _blank, _self, _parent, or _top.

Please correct it!

Thank you so much!

Bye

http://wordpress.org/plugins/social-media-feather/