If somebody wants to improve pd .. here are some suggestions
Moving around objects in the gui is slow. This is due to the communication overhead which is done for this step. I just took a short look into this part of pd and figured out that probably we should not update the objects positions that much while moving (just be sure that at the end of moving the objects are redrawn correctly).
The editor for text should be improved. At least it should be possible to use the cursor within text (e.g. comments) and insert text.
I'm writing this not having tested 0.21 yet ( But I suppose these problems are still there)
Comments ?
Guenter