Originally posted by Ryan Trevisol I think this is fairly common, even with film SLR's. A friend shot my wedding with a film Rebel (in 2006) , and when going through the scanned negatives it boggled my mind how she could take *every* shot crooked. The lean in her camera was pretty severe but it was never beyond fixing - it was just annoying to have to straighten every shot she took with that camera (read: not every shot she took, so I couldn't batch it) in Aperture.
It's possible that the focusing screen was misaligned (a slight twist on the Y axis) - that could account for the slope. Otherwise, she may have just been stabbing the shutter release or handling it improperly.
My K10D has always had a slope. I had to send it away for servicing twice, and they didn't fix it either time, despite my detailed list of the problems! Not impressed, Pentax. Maybe it was a sensor alignment problem that they couldn't fix somehow... The SR works, though, and I still like the camera. I just have to be mindful of the slope when I shoot anything with obvious horizontal or vertical lines, and tilt my view clockwise very slightly in my hand; Not an ideal fix, but it usually helps.
Good thing I don't shoot landscapes much.