You can email them to: malwaresubmit [ at ] avlab.comodo.com .
You may want to specify in the subject line "False Positive?" for clarity's sake.
As usual, zip and password protect with "infected" including that information in the body.
I have marked the topic as resolved, and closed it. If you need it reopened, just PM a Moderator (please include a link back here so we know where to go…) and we’ll be glad to do so.