I went to keyboard application to set a shortcut for the home folder (set to ctrl+super+E as default) but for some reason it launches pcmanfm and not nautilus.
I tried several things such as edit files in /usr/share/applications or gksudo nautilus /usr/share/applications, but I can't find where is the setting that launches pcmanfm (at the files I can see Exec=nautilus %U).
i'm using Ubuntu 12.10.