Bug#425742: Info received (Bug#425742: gnome-session: completely breaks desktop)

[Julien Langer]

I finally discovered what was causing this.
A custom splash screen that I had installed years ago... I didn't even
knew anymore that it was a custom splash screen :)

The strange thing is that gnome-session displays that image but than
freezes. And the old gnome-session version works fine with this image.
Maybe the file is corrupt though it displays fine in nautilus and eog.