It always seems a 'bit soft' on my Canon EOS 40d. Now I am the proud owner of a 7d, I just spent a few hours playing with the micro adjustment facility.
I followed this advice: http://www.birdphoto...justment-tricks
but I performed the procedure at many different distances from the lens to the target. 25-50x the focal length distance is recommended by some sources, but I found it more useful to do it at more 'real world' distances for my macro lenses.
Both that 60mm and my Canon Macro 100mm IS L lens benefited from tweaks, and I recommend giving it a go.
I didn't use his mirror method, I used a hot-shoe spirit level and moved the target into place on a well-lit wall instead.
Edited by Will_Clark, 09 July 2011 - 01:14 PM.