When does an update to some already published content cause it to reappear in the "New" section of OVI? Any change in the Item metadata like Price, Description...? An updated list of devices? Or does it necessarily have to have a new version of the file?

I see the same game/apps reappearing over and over in the "New" section, why is that? Aren't publishers abusing the system? Couldn't OVI QA check for genuine updates to prevent that?