Invalid means that when we go to check it, the images won't show up - the link is incorrect. If you don't specify a thumbnail at all, that is a different matter. I'll double check on caleb with this, but I'm assuming he is not saying you can't put up a freebie without a thumb, just that he's tired of having to go surf web site to find where the thumbnail (or actual download file) actually is. (I don't blame him. I help out on the approvals and it's a PITA trying to track that info down.) Cheers!