I'm also finding that listings I've used for years are now failing due in part to requesting UPC for items that don't come with UPCs and also variation data is getting corrupted somehow. When I open them up the variation data is corrupted, adding variation details that were never there before, such as color option. I'm having to delete all the data and re-enter it. Also, why does a listing pass the Error check but then Fail when attempting to post. What's the error check for if it fails anyway?