-treechildren:-moz-tree-image(unreadButtonColHeader) {
- list-style-image: url("chrome://messenger/skin/icons/readmail.gif");
+treechildren::-moz-tree-image(unreadButtonColHeader, unread) {
+ list-style-image: url("chrome://messenger/skin/icons/column-read-unread.gif");
+}
+
+/* ..... attachment column ..... */
+
+.attachmentColumnHeader {
+ list-style-image: url("chrome://messenger/skin/icons/attachment-col.gif");