Unfortunately that was a problem in the .2008 version that still hasn’t been resolved in this beta. I ended up doing manual submissions from the http://www.avast.com/contact-form.php?loadStyles Report false virus alert on website and just copy and paste the actual URL of the website and file name.

I think the problem is that, the URL is validated against the alert URL and when that has additional characters after the URL like the |> and all characters after that aren’t legit URL characters so fail this validation.

Unfortunately they don’t strip out everything after (and including) the |> so that the URL is valid. Or allow the URL being submitted to be edited removing the |> and everything after it.