diff --git a/suite/themes/modern/global/global.css b/suite/themes/modern/global/global.css
index c886f92d92c..d22f546ab30 100644
--- a/suite/themes/modern/global/global.css
+++ b/suite/themes/modern/global/global.css
@@ -61,7 +61,8 @@ toolbarbutton[type="menu-button"] {
 window, 
 page,
 dialog,
-wizard { 
+wizard,
+prefwindow { 
   background-color: #C7D0D9;
   color: #000000;
   font: message-box;
diff --git a/suite/themes/modern/global/preferences.css b/suite/themes/modern/global/preferences.css
new file mode 100644
index 00000000000..b3aa057050b
--- /dev/null
+++ b/suite/themes/modern/global/preferences.css
@@ -0,0 +1,99 @@
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Preferences UI System.
+ *
+ * The Initial Developer of the Original Code is
+ * Ben Goodger.
+ * Portions created by the Initial Developer are Copyright (C) 2005
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Ben Goodger <ben@mozilla.org>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/* ===== preferences.css =====================================================
+  == Styles used by the XUL prefwindow element.
+  ======================================================================= */
+
+@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
+
+/* ::::: dialog ::::: */
+
+prefwindow {
+  padding: 0px;
+}
+
+prefpane {
+  padding: 7px 5px 5px 5px;
+}
+
+prefwindow[type="child"] {
+  padding: 7px 5px 5px 5px;
+}
+
+prefwindow[type="child"] > prefpane {
+  padding: 0px;
+}
+
+.prefWindow-dlgbuttons {
+  padding: 0px 5px 5px 5px;
+}
+
+prefwindow[type="child"] .prefWindow-dlgbuttons {
+  padding: 0px;
+}
+
+radio[pane] {
+  margin: 0px 1px 0px 1px;
+  padding: 1px 3px 1px 3px;
+  min-width: 4.5em;
+  background-color: #FFFFFF;
+  color: #000000;
+}
+
+.paneSelector {
+  border-bottom: 2px solid;
+  -moz-border-bottom-colors: #ECEFF2 #2D3B49;
+  margin: 0px;
+  padding-left: 10px;
+  background-color: #FFFFFF;
+  color: #000000;
+}
+
+.paneButtonIcon {
+  width: 32px;
+  height: 32px;
+}
+
+radio[pane]:hover:active {
+  background-color: #90A1B3;
+  color: #FFFFFF;
+}
+
+radio[pane][selected="true"] {
+  background-color: #C7D0D9;
+}
diff --git a/suite/themes/modern/global/radio.css b/suite/themes/modern/global/radio.css
index 607f8e7a9dc..aa6362f8b7a 100644
--- a/suite/themes/modern/global/radio.css
+++ b/suite/themes/modern/global/radio.css
@@ -48,6 +48,7 @@ radio {
   margin: 0px 2px;
   border: 2px solid transparent;
   padding: 1px 2px 1px 4px;
+  -moz-border-radius: 4px 5px;
 }
 
 .radio-icon {
@@ -62,7 +63,6 @@ radio {
 
 radio[focused="true"] {
   border-color: #98A5B2;
-  -moz-border-radius: 4px 5px;
 }
   
 /* ..... disabled state ..... */
diff --git a/suite/themes/modern/jar.mn b/suite/themes/modern/jar.mn
index 8cb33cb410c..fa214b685d9 100644
--- a/suite/themes/modern/jar.mn
+++ b/suite/themes/modern/jar.mn
@@ -168,6 +168,7 @@ modern.jar:
   skin/modern/global/menulist.css                                  (global/menulist.css)
   skin/modern/global/numberbox.css                                 (global/numberbox.css)
   skin/modern/global/netError.css                                  (global/netError.css)
+  skin/modern/global/preferences.css                               (global/preferences.css)
   skin/modern/global/printPreview.css                              (global/printPreview.css)
   skin/modern/global/printPageSetup.css                            (global/printPageSetup.css)
   skin/modern/global/progressmeter.css                             (global/progressmeter.css)