legend labelsep ignored


         I am having a problem with legend recognizing the labelsep kwarg. It recognizes and makes changes according to the other kwargs (i.e. handlelen, handletextsep, axespad, pad, etc.), but when I adjust the number for labelsep, nothing happens. The default is 0.005 and I have tried numbers between 100000 and 0.0000001 with no change. I am currently using Python 2.3.5, TK version 8.4 and running my scripts in IDLE 1.0.5 with the GTKAgg backend. The problem I want to fix is to put more space between my legend labels so that when I print out the figure in a report, the labels don't overlap each other. The actual legend command I am using is shown below. Appreciate the help.