got the 550D last night and it was kinda clear when I got home so I busted it out. Was literally learning to use it in the dark, so I'm pretty happy considering. It would seem as if it was out of focus.
550D 50mm f1.8 iso1600 10sec
60 x Lights
40 x Darks
40 x Bias
Hi Rez
http://www.astrobin.com/243062/