toolbar[iconsize="small"] > toolbarpaletteitem > #back-button,
toolbar[iconsize="small"] > #back-button {
list-style-image: url("chrome://communicator/skin/icons/communicatoricons-small.png");
toolbar[iconsize="small"] > toolbarpaletteitem > #back-button,
toolbar[iconsize="small"] > #back-button {
list-style-image: url("chrome://communicator/skin/icons/communicatoricons-small.png");