diff --git a/mozilla/themes/classic/editor/editorPrimaryToolbar.css b/mozilla/themes/classic/editor/editorPrimaryToolbar.css
index 8c88e6d4cb8..d2870e38bda 100644
--- a/mozilla/themes/classic/editor/editorPrimaryToolbar.css
+++ b/mozilla/themes/classic/editor/editorPrimaryToolbar.css
@@ -206,17 +206,17 @@
 }
 
 #spellingButton {
-  -moz-image-region: rect(101px 23px 122px 0);
+  list-style-image: url("chrome://messenger/skin/icons/chkspell-normal.gif");
 }
 
 #spellingButton:hover {
-  -moz-image-region: rect(101px 46px 122px 23px);
+  list-style-image: url("chrome://messenger/skin/icons/chkspell-hover.gif");
 }
 
 #spellingButton:hover:active {
-  -moz-image-region: rect(122px 23px 143px 0);
+  list-style-image: url("chrome://messenger/skin/icons/chkspell-select.gif");
 }
 
 #spellingButton[disabled="true"] {
-  -moz-image-region: rect(122px 46px 143px 23px) !important;
+  list-style-image: url("chrome://messenger/skin/icons/chkspell-disabled.gif");
 }
diff --git a/mozilla/themes/classic/messenger/messengercompose/messengercompose.css b/mozilla/themes/classic/messenger/messengercompose/messengercompose.css
index 9613714d42a..b9ac5299168 100644
--- a/mozilla/themes/classic/messenger/messengercompose/messengercompose.css
+++ b/mozilla/themes/classic/messenger/messengercompose/messengercompose.css
@@ -83,22 +83,6 @@
   list-style-image: url("chrome://messenger/skin/icons/attach-disabled.gif");
 } 
 
-#spellingButton {
-  list-style-image: url("chrome://messenger/skin/icons/chkspell-normal.gif");
-}
-
-#spellingButton:hover {
-  list-style-image: url("chrome://messenger/skin/icons/chkspell-hover.gif");
-}
-
-#spellingButton:hover:active {
-  list-style-image: url("chrome://messenger/skin/icons/chkspell-select.gif");
-}
-
-#spellingButton[disabled="true"] {
-  list-style-image: url("chrome://messenger/skin/icons/chkspell-disabled.gif");
-}
-
 #button-save {
   list-style-image: url("chrome://messenger/skin/icons/file-normal.gif");
 }