I completely borked it. Now the icons are tiny (same size as the x button when you long-tap) and the swiping to switcher/feeds painfully slow. I reinstalled both libmeegotouchhome0 and meegotouchhome-nokia (it does replace all the css files, I checked), I also replaced all the files with the originals posted here but nothing. Oh, and I have 3 columns in portrait mode now not 4.

I don't know, maybe it keeps some cache or something...