Resolving Emacs "murrine_style_draw_box: assertion `height >= -1'"

Modify the entry in /usr/share/themes/Ambiance/gtk-2.0/gtkrc from GtkRange::trough-under-steppers = 0 to GtkRange::trough-under-steppers = 1.

Original Article: http://thehacklist.blogspot.com/2010/06/resolving-murrinestyledrawbox-assertion.html