diff --git a/chrome/content/zotero/lookup.js b/chrome/content/zotero/lookup.js
index a43d04150..99984dfea 100644
--- a/chrome/content/zotero/lookup.js
+++ b/chrome/content/zotero/lookup.js
@@ -58,6 +58,9 @@ const Zotero_Lookup = new function () {
 		translate.setTranslator(translators);
 		
 		translate.setHandler("done", function(translate, success) {
+			identifierElement.style.opacity = 1;
+			identifierElement.disabled = false;
+			document.getElementById("zotero-lookup-progress").hidden = true;
 			if(success) {
 				document.getElementById("zotero-lookup-panel").hidePopup();
 			} else {
@@ -78,6 +81,10 @@ const Zotero_Lookup = new function () {
 			if(collection) collection.addItem(item.id);
 		});
 		
+		identifierElement.style.opacity = 0.5;
+		identifierElement.disabled = true;
+		document.getElementById("zotero-lookup-progress").hidden = false;
+		
 		translate.translate(libraryID);
 		return false;
 	}
@@ -102,7 +109,12 @@ const Zotero_Lookup = new function () {
 		if(!Zotero.isFx4) {
 			document.getElementById("zotero-lookup-panel").style.padding = "10px";
 		}
-		document.getElementById("zotero-lookup-textbox").focus();
+		
+		document.getElementById("zotero-lookup-progress").hidden = false;
+		var identifierElement = document.getElementById("zotero-lookup-textbox");
+		identifierElement.style.opacity = 1;
+		identifierElement.disabled = false;
+		identifierElement.focus();
 	}
 	
 	/**
diff --git a/chrome/content/zotero/zoteroPane.xul b/chrome/content/zotero/zoteroPane.xul
index 7aff1895d..1081ce51e 100644
--- a/chrome/content/zotero/zoteroPane.xul
+++ b/chrome/content/zotero/zoteroPane.xul
@@ -142,10 +142,13 @@
 					<toolbarbutton id="zotero-tb-item-from-page" class="zotero-tb-button" tooltiptext="&zotero.toolbar.newItemFromPage.label;" command="cmd_zotero_newItemFromCurrentPage"/>
 					<toolbarbutton id="zotero-tb-lookup" class="zotero-tb-button" tooltiptext="&zotero.toolbar.lookup.label;" type="panel">
 						<panel id="zotero-lookup-panel" type="arrow" onpopupshown="Zotero_Lookup.onShowing()"
-								onpopuphidden="Zotero_Lookup.onHidden()" noautohide="true">
+								onpopuphidden="Zotero_Lookup.onHidden()">
 							<vbox>
 								<description>&zotero.lookup.description;</description>
-								<textbox id="zotero-lookup-textbox" style="margin: 2px 0 2px 0" onkeypress="return Zotero_Lookup.onKeyPress(event)" flex="1"/>
+								<stack>
+									<progressmeter id="zotero-lookup-progress" mode="undetermined" hidden="true"/>
+									<textbox id="zotero-lookup-textbox" onkeypress="return Zotero_Lookup.onKeyPress(event)" flex="1"/>
+								</stack>
 							</vbox>
 						</panel>
 					</toolbarbutton>