[Plugin: SimpleModal Contact Form (SMCF)] smcf-link not working in text widget in firefox

This is a strange issue I can’t figure out. I added SMCF to a site using class=”smcf-link” in a text widget a few weeks ago and everything worked fine. Today it’s suddenly broken when clicking the link i Firefox 3.5.8 on Win XP, but it still works fine in all other browsers. It also works fine in FF if I add the PHP-code to the sidebar to render the link.

You can check this out here. In the right sidebar, the link saying “Skicka ett meddelande till BLU” below the header that says “Kontakta BLU” is added using the PHP-code and works fine in all browsers. The same link below the header “Contact us test” is added using this link code <a href="http://webverkstaden.com/blu.to/Kontaktpersoner/" class="smcf-link">Skicka ett meddelande till BLU</a>, and doesn’t work i FF.

Any suggestions?