I shot some out-of-focus lego bricks, and I am getting unpleasant artifacts in the bokeh (the out-of-focus areas) where colors blend. Instead of being smooth, the bokeh looks like somebody splotched color on the image. This is using ACR 4.3.1 in LightRoom 1.3, processing Olympus E-3 files.
ACR bokeh: http://i270.photobucket.com/albums/jj115/lucaPCP/samples/Bokeh-LR.jpg
Olympus Studio bokeh: http://i270.photobucket.com/albums/jj115/lucaPCP/samples/Bokeh-Oly.jpg
Now granted, most color transitions in reality are less sharp, and so this problem may not be very prevalent, but I wanted to raise the issue nevertheless -- have others noticed the same? Is it common for all cameras? (I believe it must depend on the processing, not the optics!).