This appears to be something new and I'm not sure if it's the memory card, the camera, settings, etc.(although I was shooting in Auto for this set).
Hopefully the problem will show up here-the sawtoothed pixellation on the edges in the photo. This was taken yesterday-colors are accurate, shot in RAW format. Nothing else is pixellated, just any edge where two colors meet. The more contrast between the colors, ie; red to white, the more pronounced the "sawtoothage".
Can't be ISO because there's no abnormal graining and I can't get the stats because the photo can only be saved or uploaded as something other than RAW. Below are both a cutout showing the effect and the original unretouched.
Note that while there is some blurring, there is no distortion in this other than the edges.
This is the shot:
As a whole, it's relatively crisp, shot on a partly sunny afternoon, about 4pm. EV was at -1 to cut glare. Lens used was a Sigma 28-200mm. Wish I could get the stats, but they're not showing anywhere.
Card used is a SanDisk 1.0g.