Font Awesome 'Optimize CSS' bug

Hi,

when I enable 'Optimize CSS' and the name of the theme contains at least
one dash (e.g.:'my-theme'), Font Awesome is not working any longer.

The theme name in the Font Awesome section of the compressed CSS-file
will be cutted after the first dash so the rest of the theme name including
the next slash is missing.

Best regards,

Olli