My scan (using the most recent build of AVAST 5 free) flagged "C:\Program Files\Common Files\DVDVideoSoft\Dll\HttpVideoDownloader.dll" as a PUP:Win32:PSWtool-L. It's from a pretty common software package, so i ran it through Virus Total and Avast 5 was the only one that flagged it.
Thanks for your product though! It's great.