Hi all, First, I would like to congratulate you for your work on Matplotlib. I am using Matplotlib widgets in all my current projects, embedded in PyQt graphical user interfaces. As you may know, PyQt 4.4.2 has been released a few days ago. And I found out a performance bug when embedding a Matplotlib 0.91.2 canvas in a PyQt 4.4.2 object: the pan/zoom feature is very slow (with PyQt 4.3.3, and the exact same scripts, pan/zoom is real-time). I am posting this in PyQt mailing-list too, but I guess that you could have more ideas on that matter (Matplotlib widgets may not be used very often in PyQt). Thanks for your help! Regards, Pierre Raybaut