I've been away for most of June and July, and looking at my usage meter, I can see that my bit torrent client (Vuze) was happily uploading until 10am on 1st July 2012.
Now I am home, I have successfully downloaded more (from thebox) but still no uploading activity.
It could be due to a windows update, but I thought it could be due to some change that TC have made, and if that's the case, other people might have experienced the same thing.