Ununderstandable blacklisting

Hello, I discovered yesterday that my site hxtp://www.lapasserelle.com was blacklisted by Avast! I haven’t the foggiest idea why. My site has excellent ratings from all the common rating sites (wot, webutation, wepawet, etc.), and it is not blacklisted by other well known anti-virus and anti-spyware softwares. The free access to my site from people using avast is important to me. I’m at loss about what to do. Can you help me?
Thanks,
Andy

You can report a possible False Positive here>>http://www.avast.com/contact-form.php