diff --git a/mozilla/themes/modern/communicator/toolbar.css b/mozilla/themes/modern/communicator/toolbar.css
index aa2c0797b4e..83dfb291e80 100644
--- a/mozilla/themes/modern/communicator/toolbar.css
+++ b/mozilla/themes/modern/communicator/toolbar.css
@@ -45,7 +45,7 @@
   width: 77px;
   height: 50px;
   background-repeat: no-repeat;
-  background-align: top;
+  background-position: top;
 }
 
 .toolbar-primary-mid-top {
diff --git a/mozilla/themes/modern/editor/textEditor.css b/mozilla/themes/modern/editor/textEditor.css
index 658a26d0a38..025bd9a024c 100644
--- a/mozilla/themes/modern/editor/textEditor.css
+++ b/mozilla/themes/modern/editor/textEditor.css
@@ -22,6 +22,6 @@
 
 @namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
 
-.separator_small {
+.separator-small {
   width: 1em;
 }
diff --git a/mozilla/themes/modern/global/tabbox.css b/mozilla/themes/modern/global/tabbox.css
index e05e3743214..a0db8f31054 100644
--- a/mozilla/themes/modern/global/tabbox.css
+++ b/mozilla/themes/modern/global/tabbox.css
@@ -250,7 +250,7 @@ tab:hover:active[selected="true"] > .tab-right >  .tab-right-btm {
 
 .tab-bottom > .tab-mid > .tab-mid-btm {
   background: none;
-  height: none;
+  height: 0px;
 }
 
 .tab-bottom > .tab-right {