Moving/Reposition Window pauses script

[xfratboy]

I'm trying to understand why a certain behavior happens on a toplevel stack. If I have an animation process running (move object from p1to p20) and reposition or move the window to another part of my screen, the process going on will stop until I release the mouse. So for example, I have a moving object going back and forth in my program and when I move the window (by clicking and holding down the left mouse on the window title bar , i.e. grabbing the title bar and moving), the movement action of the animation that was going on will freeze until I release the mouse. I do not experience this behavior if I set the decorations to empty and "roll my own" window decorations, but in doing so I loose a lot of the native look and feel of a program not to mention the program does not show up on the taskbar or when issuing an alt-tab toggle which is common in windows environments. Any ideas?