Hi, Any hints on this one before I go deeper? Here are the last few lines of the traceback I get with the PS backend using the latest CVS. I get no such error with the TkAgg backend. File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/ python2.3/site-packages/matplotlib/text.py", line 77, in _draw renderer.draw_text(gc, x, y, self) File "/System/Library/Frameworks/Python.framework/Versions/2.3/lib/ python2.3/site-packages/matplotlib/backends/backend_ps.py", line 142, in draw_text l,b,w,h = font.get_str_bbox(text) AttributeError: get_str_bbox Cheers! Andrew