Pressing hotkeys while drawing shapes can freeze the Dia GUI
Submitted by Erwin C
It is very easy to reproduce:
Select the 'Ellipse' drawing tool (or press the E key)
Starting drawing an Ellipse by pressing the Left Mouse button, but don't release the Left Mouse button yet
Select the Arc drawing tool by pressing the A key using the keyboard (while keeping the mouse button pressed!)
now the GUI becomes unresponsive and locks up. There seems no interaction possible anymore, except for killing the program using the task manager.
See also discussion here: http://mail.gnome.org/archives/dia-list/2010-May/msg00004.html
By the way, it seems it is not specific to Ellipse or Arc, they are just examples.