I was the same way at first, trying to figure out why the hell QR refused to show up. I'm still up in the air about how I'm going to use it: leave Apple alerts on and slide to bring up QR at the lockscreen, or block popups and use LockInfo to launch QR. (I kind of have a thing about keeping my lockscreen uncluttered with popups.)
My favorite setup was always to block all popups except Bite, but I can't seem to figure out how to do that now and still get statusbar/LockInfo notifications for everything. (I can turn off the View in Lockscreen option but that seems to also turn off my statusbar notifications; or I can have View in Lockscreen set to ON and block popups with LockInfo, which is my current setup.) I'm guessing this will be solved when PopUp Blocker gets an iOS 5 update. But if anyone has a different way that works now I'm all ears.