diff --git a/toolkit/mozapps/extensions/content/update.xul b/toolkit/mozapps/extensions/content/update.xul
index 094651fa5fba..74598381456b 100644
--- a/toolkit/mozapps/extensions/content/update.xul
+++ b/toolkit/mozapps/extensions/content/update.xul
@@ -87,7 +87,6 @@
     <description>&noupdates.intro.desc;</description>
     <separator class="thin"/>
     <hbox id="updateCheckErrorNotFound" class="alertBox" hidden="true" align="top">
-      <image id="alert"/>
       <description flex="1">&noupdates.error.desc;</description>
     </hbox>
     <separator class="thin"/>
@@ -157,7 +156,6 @@
               onpageshow="gAdminDisabledPage.onPageShow();">
     <separator/>
     <hbox class="alertBox" align="top">
-      <image id="alert"/>
       <description flex="1">&adminDisabled.warning.label;</description>
     </hbox>
     <separator flex="1"/>
diff --git a/toolkit/themes/osx/mozapps/extensions/update.css b/toolkit/themes/osx/mozapps/extensions/update.css
index 0ec9dad6ae20..a0a016868c1a 100644
--- a/toolkit/themes/osx/mozapps/extensions/update.css
+++ b/toolkit/themes/osx/mozapps/extensions/update.css
@@ -2,10 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#alert {
-  list-style-image: url("chrome://mozapps/skin/update/warning.gif"); 
-}
-
 .throbber {
   list-style-image: url("chrome://global/skin/icons/loading.png");
   width: 16px;
diff --git a/toolkit/themes/windows/mozapps/extensions/update.css b/toolkit/themes/windows/mozapps/extensions/update.css
index f872b438b032..0db179330331 100644
--- a/toolkit/themes/windows/mozapps/extensions/update.css
+++ b/toolkit/themes/windows/mozapps/extensions/update.css
@@ -2,10 +2,6 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-#alert {
-  list-style-image: url("chrome://mozapps/skin/update/update.png"); 
-}
-
 .throbber {
   list-style-image: url("chrome://global/skin/icons/loading.png");
   width: 16px;