Right. So yesterday I was fiddling around taking some self-portraits (I'm an ugly goober, but it was for a contest and I needed the practice anyway) with the XTi. It was a bright, sunny day here in Michigan, amplified somewhat by the snow on the ground. I had all of my curtains open, there was plenty of light in the house (or so I thought). I even had my tripod out. Taking pictures was... interesting. According to the camera it was far too dark for 100 ISO (25 second exposures) so I had to bump it up to 400. Not out of the question, of course, most indoor photos require that anyway, right? So after loading up the files on my computer (RAW files), I notice something; they're noisy as hell. The nominally white wall behind my ugly mug is riddled with color noise and my face is a blocky mess. This is with Raw! What's going on here? I was under the impression that raw files were far superior as far as file quality goes. Or is there a major disadvantage in that the basic RAW format doesn't go through any processing whatsoever and thus the original images will be blocky and noisy? Or am I just doing this all wrong (always a possibility)?