Comment 4 for bug 503932

Reproduce (on my system):

1. F4 - draw a rectangle
2. F1 - select it
3. Ctrl+Shift+F grab and drag Transparency slider (I think it may be called Opacity in 0.47?) for object (not alpha value for stroke/fill color)
4. Notice the 2-5 second delay between each update of rectangle graphcis/slider position. It sometimes freezes Inkscape to "gray mode" (application not responding to events) on my Ubuntu computer.