Hello, When upgrading from mpl 0.82 to 0.83.2 an application I made stopped working. When displaying two plots simultaneously, the second plot does not respond, neither to the toolbar, nor to direct changes from the program. If one keeps trying interacting with the toolbar python will also freeze (or enter an infinity loop or something). It worked well on mpl 0.82. I made an example script that reproduces this behaviour. I was not able to identify the cause, but neither the toolbar nor the specific type of graph is to blame (in my application I use imshow, here I use plot). My system has Debian Sarge (stable), python 2.3.5 and pygtk 2.0.0 Best regards, João Silva