Still some minor issues left, like missing icons (firefox etc), maybe that's the problem of bad XDG_DATA_DIRS. I wonder if I made misstake to always install meta packages for kubuntu, edubuntu, xubuntu, etc too, since as far as I can recall, that file you suggested to remove is part of edubuntu package, or something like that ...
Still some minor issues left, like missing icons (firefox etc), maybe that's the problem of bad XDG_DATA_DIRS. I wonder if I made misstake to always install meta packages for kubuntu, edubuntu, xubuntu, etc too, since as far as I can recall, that file you suggested to remove is part of edubuntu package, or something like that ...