@Hongbo Zhu:
You are using a version of glib2.0 that is incompatible with the version of gdk-pixbuf Ubuntu 12.04. You probably installed it from a PPA.
You need to revert the glib2.0 packages to the versions that come with Ubuntu 12.04 to solve your issue.
@Hongbo Zhu:
You are using a version of glib2.0 that is incompatible with the version of gdk-pixbuf Ubuntu 12.04. You probably installed it from a PPA.
You need to revert the glib2.0 packages to the versions that come with Ubuntu 12.04 to solve your issue.