I have the following installed:
$ dpkg -l "gtk*engine*" | grep "^ii" | awk '{print $2}' gtk-engines-pixmap gtk2-engines gtk2-engines-clearlooks gtk2-engines-crux gtk2-engines-industrial gtk2-engines-lighthouseblue gtk2-engines-mist gtk2-engines-murrine gtk2-engines-pixbuf gtk2-engines-redmond95 gtk2-engines-smooth gtk2-engines-thinice gtk2-engines-ubuntulooks
Removing gtk-engines-pixmap has no effect.
I have the following installed:
$ dpkg -l "gtk*engine*" | grep "^ii" | awk '{print $2}' clearlooks industrial lighthouseblue murrine redmond95 thinice ubuntulooks
gtk-engines-pixmap
gtk2-engines
gtk2-engines-
gtk2-engines-crux
gtk2-engines-
gtk2-engines-
gtk2-engines-mist
gtk2-engines-
gtk2-engines-pixbuf
gtk2-engines-
gtk2-engines-smooth
gtk2-engines-
gtk2-engines-
Removing gtk-engines-pixmap has no effect.