diff --git a/chrome/content/zotero-platform/mac/overlay.css b/chrome/content/zotero-platform/mac/overlay.css
index acb230d456..6b3ac0bd92 100644
--- a/chrome/content/zotero-platform/mac/overlay.css
+++ b/chrome/content/zotero-platform/mac/overlay.css
@@ -127,7 +127,7 @@ input {
 	-moz-appearance: none;
 }
 
-#zotero-view-tabbox > tabs {
+#zotero-editpane-tabs {
 	-moz-appearance: none;
 	background: -moz-linear-gradient(top, #ededed, #cccccc);
 	border-style: solid;
@@ -136,15 +136,15 @@ input {
 	padding: 2px 0 2px 0;
 }
 
-#zotero-view-tabbox > tabs > tab > hbox {
+#zotero-editpane-tabs > tab > hbox {
 	padding: 0;
 }
 
-#zotero-view-tabbox > tabs > tab > hbox > .tab-icon {
+#zotero-editpane-tabs > tab > hbox > .tab-icon {
 	display: none;
 }
 
-#zotero-pane #zotero-view-tabbox > tabs > tab {
+#zotero-editpane-tabs > tab {
 	-moz-box-orient: vertical;
 	-moz-box-align: center;
 	-moz-appearance: toolbarbutton;
@@ -153,7 +153,7 @@ input {
 	padding: 3px 1px 3px 1px;
 }
 
-#zotero-pane #zotero-view-tabbox > tabs > tab > hbox .tab-text {
+#zotero-editpane-tabs > tab > hbox .tab-text {
 	font-size: 11px;
 	font-weight: bold;
 	margin: 2px 7px 2px 9px !important;
@@ -161,11 +161,11 @@ input {
 }
 
 /* This seems to be necessary to center the tabs. Not sure why. */
-#zotero-pane #zotero-view-tabbox > tabs > tab:last-of-type > hbox .tab-text {
+#zotero-editpane-tabs > tab:last-of-type > hbox .tab-text {
 	margin: 2px 9px 2px 9px !important;
 }
 
-#zotero-pane #zotero-view-tabbox > tabs > tab[selected=true] > hbox .tab-text {
+#zotero-editpane-tabs > tab[selected=true] > hbox .tab-text {
 	color: #FFF !important;
 	text-shadow: rgba(0, 0, 0, 0.4) 0 1px;
 }
diff --git a/chrome/content/zotero-platform/win/overlay.css b/chrome/content/zotero-platform/win/overlay.css
index 591d8ed3df..2bd81b6819 100644
--- a/chrome/content/zotero-platform/win/overlay.css
+++ b/chrome/content/zotero-platform/win/overlay.css
@@ -154,7 +154,7 @@ tree {
 	border-color: var(--theme-border-color);
 }
 
-#zotero-view-tabbox > tabs {
+#zotero-editpane-tabs {
 	margin-top: 2px;
 }
 
diff --git a/chrome/content/zotero/zoteroPane.js b/chrome/content/zotero/zoteroPane.js
index 97f51c9231..6bf6a842ee 100644
--- a/chrome/content/zotero/zoteroPane.js
+++ b/chrome/content/zotero/zoteroPane.js
@@ -5216,7 +5216,7 @@ var ZoteroPane = new function()
 		
 		// Allow item pane to shrink to available height in stacked mode, but don't expand to be too
 		// wide when there's no persisted width in non-stacked mode
-		itemPane.setAttribute("flex", stackedLayout ? 1 : 0);
+		//itemPane.setAttribute("flex", stackedLayout ? 1 : 0);
 		
 		this.handleTagSelectorResize();
 	}
diff --git a/chrome/content/zotero/zoteroPane.xul b/chrome/content/zotero/zoteroPane.xul
index d2bb5da07f..86035d1cb5 100644
--- a/chrome/content/zotero/zoteroPane.xul
+++ b/chrome/content/zotero/zoteroPane.xul
@@ -580,7 +580,7 @@
 				<vbox>
 					<hbox id="zotero-reader-toolbar-extension" height="32" hidden="true"></hbox>
 					<!-- itemPane.xul -->
-					<vbox id="zotero-item-pane"/>
+					<vbox id="zotero-item-pane" flex="1"/>
 				</vbox>
 			</hbox>
 		</vbox>