diff --git a/chrome/skin/default/scaffold/scaffold.css b/chrome/skin/default/scaffold/scaffold.css
index 1c1cf58b0a..08cb45917a 100644
--- a/chrome/skin/default/scaffold/scaffold.css
+++ b/chrome/skin/default/scaffold/scaffold.css
@@ -143,6 +143,10 @@ treechildren::-moz-tree-row {
   background-image: none;
 }
 
+richlistitem hbox {
+	overflow: hidden;
+}
+
 richlistitem[selected] menulist:focus-visible {
   outline-offset: -2px;
 }