Actually WackyRabbit, that is for whether or not your torrent client is connectable. I think what this user is asking is the arrows on the individual torrents going red. In this case, a red arrow means that there is some sort of tracker error, which is usually Unregistered Torrent. To find out for sure, when the torrent arrow goes red, click the torrent in uTorrent, then go to the "Trackers" tab at the bottom. It should tell you there why it is red. If the error is "Unregistered Torrent", then it means that the torrent has been deleted either due to a DMCA takedown or because it is a duplicate. The other possibility (though not likely) is that the torrent you are trying never existed on the tracker to begin with, although as I said, this is very unlikely.