Odd 0.7.2 marker behaviour

I've just upgraded to 0.7.2 (Python 2.4 on windows) and I'm seeing strange behaviour with the scatter plot markers. If I run the scatter_demo.py and change the marker to use any of the triangles:

     '^' : triangle up
     '>' : triangle right
     'v' : triangle down
     '<' : triangle left

the resulting tkagg or png output has the triangles pointing in odd directions (sometimes even at 45 degrees).