It says "implemented", but I can't find that option in 1.5. There are some tray options, but there's no special option for this request! Sometimes µTorrent does startup in tray, I believe it has something to do with how you closed µTorrent the previous time. I'd like µTorrent to always startup in tray, no matter what. µTorrent is the perfect Bittorrent client. For me, this single option is the only thing that's missing.