--- a/pylib/mozreview/mozreview/static/mozreview/css/common.less
+++ b/pylib/mozreview/mozreview/static/mozreview/css/common.less
@@ -264,16 +264,28 @@ body.datagrid-page #page-container .data
     border: 1px #D4DDE4 solid;
   }
 
   .box:before {
     border-right-color: #D4DDE4;
   }
 }
 
+/* Diffs in Reviews */
+#diffs .diff-box {
+  border-radius: 0;
+  -moz-border-radius: 0;
+  -webkit-border-radius: 0;
+  border: 0;
+}
+
+.sidebyside thead .filename-row th {
+  background: #d4dde4;
+}
+
 /* Dialogs */
 .modalbox-inner, .modalbox-title, .modalbox {
   background-image: none;
   border-radius: 0;
   -moz-border-radius: 0;
   -webkit-border-radius: 0;
 }
 
@@ -283,8 +295,15 @@ body.datagrid-page #page-container .data
 
 .modalbox-inner {
   background: #eaeff2;
 }
 
 .modalbox-bg {
   background: rgba(255, 255, 255, 0.6) !important; /* overriding JS */
 }
+
+/* Comment Dialogs */
+.comment-dlg {
+  border-radius: 0;
+  -moz-border-radius: 0;
+  -webkit-border-radius: 0;
+}