I have found a way using Photoshop Elements 6 to control purple fringing. The technique is based on this:
Correcting Chromatic Aberrations
Starting with this picture:
Taken with a DA40mm at F4, 1/125s. Note the purple fringing around the leaves in the upper right hand corner:
To address purple fringing using PSE6, I did the following:
1)Under the "Enhance" drop-down tool bar, I selected "Adjust Color"
2)Select "Adjust Hue/Saturation"
OR: To skip this step, hit "Ctrl" + "U"
3)The Hue/Saturation window will pop up. Go to the "Edit" tab, and select "Magenta" from the pull down menu.
4)Move the middle slider for Saturation to -80.
5)Move the last slider for lightness to +16
6)Slowly slide the bottom color slider towards the left while watching the PF. Eventually, the PF will decolorize.
7)Go from there (sharpen, save, whatever).
Here is the final result:
with a crop: