[Qt-interest] Qt-based programs not painting on screen

[Rendezvous]

I'm in the process of making my own window manager in Qt, but for some reason my window manager seems to be preventing Qt-based programs from painting on the screen. I have no idea what the problem is; all i know is that if i don't ask for SubstructureRedirectMask events, then Qt-based programs can paint themselves. I've looked in the source code of other Qt-based window managers and i can't figure out what is wrong with mine. If anyone is willing to help me understand what is wrong, i'd very much appreciate it; i've been trying to solve this for days. The source code for the window manager can be browsed through here: http://code.google.com/p/dexiosdesktop/source/browse/#svn/trunk/src/DexWM

As a side note, although i haven't verified it with Qt 4.4, my window manager doesn't prevent Qt-based programs from painting with Qt 4.3. I'm currently using Qt 4.5 and i think this is something that deals with Qt 4.5 specifically.