Everytime I try to open Ubuntu (any version, since from 8.04 with which I started) default wallpaper, named "warty-final-ubuntu.png", I get the following error.
I have also reported bug for the same, more than a year ago but it is still unresolved. Also I don't get the point why the default wallpaper is still named as "warty-final-ubuntu.png" instead of having actual code name prefix to which wallpaper belongs eg. "precise-final-ubuntu.png" and so on.
Lots of community effort goes under development of this marvelous distribution but we're still missing out to fix such silly issues, which is directly/indirectly affecting the number of new adopters.