Okay I experienced this today:

After I installed the CSSU I started with tweaking the transtitions. I used meamodder and theme customizer. After I used those programs I had lost the zaxisrotation and forcerotation. So I started to add the next rules at the end of the transitions.ini:

zaxisrotation = 1
forcerotation = 1

I did this within the next files:

/opt/theme-customizer/transitions.ini
/usr/share/hildon-desktop/transitions.ini
/etc/hildon/theme/transitions.ini

Whithin that order. With every change I first tried killall hildon-desktop and noticed that, that didn't work and then rebooted the phone. After I did all this I opened all these transitions.ini one at a time and saved them again and did every time a killall hildon-desktop. The last thing I did was adding those lines to a blank transitions.ini that I found in /etc/hildon/theme/ and did a killall hildon-desktop command. This resulted in a reboot loop. I am not sure whether you guys can do something with this feedback, but I was just sharing my experience. Before I started messing around with meamodder and theme customizer the CSSU version of Maemo was grate! I am going to reflash now and install the CSSU again I think but then without using meamodder for the transitions and theme customizer because there is still some work in there.