Then I'm a lucky man, because I removed, accidentally , a "}" about at the middle of the meegotouchhome.css file, but I only had a black home screens, with only lockscreen and LPS working, but no reboot loop
However, maybe has nothing to do, but I noticed that in Nemo there isn't the quick launch bar, but instead of it the lockscreen bouncing if you release the finger after a few inches; maybe, because it is based on a similar project, it's possible to find out some interesting things by looking at the css of its themes.
And of course, a "reboot loop" of a Nemo OS it's much easier to manage, if it's in a Multiboot system.. I mean it (as far as possible) like a test, or integration of some new functionality, system.