Bug#591304: crashes with "code should not be reached" assertion when moving windows around

[CLandel]

Package: metacity
Version: 1:2.30.1-2

Hi,

I use compiz and switch to metacity with the fusion-icon from time to 
time. When metacity is activated, it tends to crash when I move windows 
around (especially when moving them over edges - but also otherwise). I 
managed to capture this error message by issuing the "metacity 
--replace" command-line in a terminal:

**
metacity:ERROR:core/boxes.c:1161:meta_rectangle_edge_aligns: code should 
not be reached

I have a feeling that this relates to bug #510833, I'm not sure though.
If there is more I can do to track this issue down, please tell me how.

Thank you in advance,
Regards,
"Titan"