Description of problem:
Despite the native-window-placement extension being installed, the thumbnails are all of (roughly) the same size (instead of being made smaller proportionally) and laid out in a grid (instead of "roughly the same place as they are on the workspace).

Version-Release number of selected component (if applicable):
gnome-shell-3.2.1-2.fc16.x86_64
gnome-shell-extension-native-window-placement-3.2.0-1.fc16.noarch

How reproducible:
Reproducible

Steps to Reproduce:
1. Go into the overview (mouse to upper left, window key, or Alt+F1)
  
Actual results:
Window thumbnails are all roughly the same size and laid out in a grid.

Expected results:
Window thumbnails are made proportionally smaller and placed roughly in the location where the windows are on the workspace.