diff --git a/chrome/content/zotero-platform/mac/overlay.css b/chrome/content/zotero-platform/mac/overlay.css
index 6d788dbe4c..b68163f771 100644
--- a/chrome/content/zotero-platform/mac/overlay.css
+++ b/chrome/content/zotero-platform/mac/overlay.css
@@ -100,7 +100,7 @@
 }
 
 #zotero-tb-sync {
-	margin: none;
+	margin: 0;
 }
 
 #zotero-view-tabbox {
@@ -209,7 +209,7 @@
 #zotero-view-tabbox > tabs > tab:first-child[selected=true]:active:hover,
 #zotero-view-tabbox > tabs > tab[first-visible][selected=true]:active:hover,
 #zotero-view-tabbox > tabs[chromedir=rtl] > tab:last-child[selected=true]:active:hover,
-#zotero-view-tabbox > tabs[chromedir=rtl] > tab[last-visible][selected=true]:active:hover, {
+#zotero-view-tabbox > tabs[chromedir=rtl] > tab[last-visible][selected=true]:active:hover {
   -moz-border-image: url("chrome://zotero/skin/mac/viewbutton-left-selected-down.png") 0 4 0 6 repeat stretch;
 }
 
@@ -327,7 +327,7 @@
 	width: 8px !important;
 	background-image: url("chrome://zotero/skin/mac/vsplitter.png");
 	background-repeat: repeat-y;
-	padding: none;
+	padding: 0;
 }
 
 #zotero-tree-splitter[state=collapsed] > grippy
@@ -348,7 +348,7 @@
 	height: 8px;
 	background-image: url("chrome://zotero/skin/mac/hsplitter.png") !important;
 	background-repeat: repeat-x;
-	padding: none;
+	padding: 0;
 }
 
 #zotero-tags-splitter > grippy
diff --git a/chrome/skin/default/zotero/bindings/itembox.css b/chrome/skin/default/zotero/bindings/itembox.css
index 79a3dedb59..4ffeadb3ee 100644
--- a/chrome/skin/default/zotero/bindings/itembox.css
+++ b/chrome/skin/default/zotero/bindings/itembox.css
@@ -70,7 +70,7 @@ row label
 	-moz-box-align: center;
 	-moz-box-pack: end;
 	height: 18px !important;
-	min-height: none !important;
+	min-height: 0 !important;
 	max-height: 18px !important;
 	padding-right: 2px;
 }