You may want to check out this post here when I killed my clutch a few weeks ago. I'm not exactly sure what you're experiencing, but as you can see, I tried all the 'adjustments' first, and found no difference, although mine was much worse. You might be experience the fork bending problem I was experiencing for about a year before the clutch fork or whatever it was broke completely.
http://www.pelicanparts.com/cgi-bin/vb/showthread.php?s=&threadid=58909&highlight=clutch