Comment 13 for bug 818864

This is so idiotic. First running ~/.xsession gets bork in lucid since .desktop files seems to be a better solution. Now you remove the .desktop file since 99% other people do not know what the special entry is. Perhaps revert back to how it was before like if you have ~/.xsession file then then run it? It is a very inconvenient if every time a user that uses xsession upgrade you have to recreate a file in /usr/share/xsession