diff --git a/chrome/content/zotero-platform/mac/overlay.css b/chrome/content/zotero-platform/mac/overlay.css
index ff1d5191e..d23c021fe 100644
--- a/chrome/content/zotero-platform/mac/overlay.css
+++ b/chrome/content/zotero-platform/mac/overlay.css
@@ -341,7 +341,7 @@
   color: #ffffff !important;
 }
 
-#zotero-tree-splitter, #zotero-view-splitter
+#zotero-collections-splitter, #zotero-items-splitter
 {
 	-moz-appearance: none;
 	-moz-border-start: none !important;
@@ -352,7 +352,7 @@
 	background-color: #8b8b8b !important;
 }
 
-#zotero-tree-splitter[state=collapsed]
+#zotero-collections-splitter[state=collapsed]
 {
 	border-right: 1px;
 	border-color: #A5A5A5;
@@ -364,7 +364,7 @@
 	padding: 0;
 }
 
-#zotero-tree-splitter[state=collapsed] > grippy
+#zotero-collections-splitter[state=collapsed] > grippy
 {
 	-moz-appearance: none;
 	background-image: url("chrome://zotero/skin/mac/vgrippy.png");
@@ -394,7 +394,7 @@
 	height: 8px;
 }
 
-#zotero-tags-splitter > grippy:hover, #zotero-tree-splitter > grippy:hover
+#zotero-tags-splitter > grippy:hover, #zotero-collections-splitter > grippy:hover
 {
 	background-color:transparent;
 }
diff --git a/chrome/content/zotero/zoteroPane.xul b/chrome/content/zotero/zoteroPane.xul
index cabcf12e3..9acca21f8 100644
--- a/chrome/content/zotero/zoteroPane.xul
+++ b/chrome/content/zotero/zoteroPane.xul
@@ -286,10 +286,10 @@
 						oncommand="ZoteroPane_Local.updateTagFilter()"/>
 				</vbox>
 				
-				<splitter id="zotero-tree-splitter" resizebefore="closest" resizeafter="closest" collapse="before"
+				<splitter id="zotero-collections-splitter" resizebefore="closest" resizeafter="closest" collapse="before"
 					onmousemove="document.getElementById('zotero-items-toolbar').setAttribute('state', this.getAttribute('state'));ZoteroPane_Local.updateToolbarPosition();"
 					oncommand="ZoteroPane_Local.updateToolbarPosition()">
-					<grippy/>
+					<grippy id="zotero-collections-grippy"/>
 				</splitter>
 				
 				<vbox id="zotero-items-pane" zotero-persist="width" flex="1">
@@ -396,7 +396,7 @@
 					</deck>
 				</vbox>
 				
-				<splitter id="zotero-view-splitter" resizebefore="closest" resizeafter="closest"
+				<splitter id="zotero-items-splitter" resizebefore="closest" resizeafter="closest"
 					onmousemove="ZoteroPane_Local.updateToolbarPosition()"
 					oncommand="ZoteroPane_Local.updateToolbarPosition()"/>