diff --git a/chrome/content/zotero-platform/win/overlay.css b/chrome/content/zotero-platform/win/overlay.css
index 6eab56783d..849c86b18a 100644
--- a/chrome/content/zotero-platform/win/overlay.css
+++ b/chrome/content/zotero-platform/win/overlay.css
@@ -2,6 +2,11 @@
 	margin-left: 5px;
 }
 
+#zotero-tb-sync-warning {
+	margin-right: 2px;
+}
+
+
 #zotero-tb-sync {
 	margin-right: 1px;
 }
diff --git a/chrome/content/zotero/xpcom/storage.js b/chrome/content/zotero/xpcom/storage.js
index 239089f615..9ee41e610d 100644
--- a/chrome/content/zotero/xpcom/storage.js
+++ b/chrome/content/zotero/xpcom/storage.js
@@ -161,7 +161,13 @@ Zotero.Sync.Storage = new function () {
 		_syncInProgress = true;
 		_changesMade = false;
 		
-		Zotero.Sync.Storage.checkForUpdatedFiles(null, null, _session.includeUserFiles, _session.includeGroupFiles);
+		try {
+			Zotero.Sync.Storage.checkForUpdatedFiles(null, null, _session.includeUserFiles, _session.includeGroupFiles);
+		}
+		catch (e) {
+			_syncInProgress = false;
+			throw (e);
+		}
 		
 		var lastSyncCheckCallback = function (lastSyncTime) {
 			var downloadFiles = true;
@@ -537,7 +543,7 @@ Zotero.Sync.Storage = new function () {
 					if (e.name == 'NS_ERROR_FILE_ACCESS_DENIED') {
 						Zotero.debug(e);
 						// TODO: localize
-						var fileCannotBeUpdated = "The file '" + file.leafName
+						var fileCannotBeUpdated = "The file '" + file.path
 							+ "' cannot be updated.";
 						var checkFileWindows = "Check that the file is not currently "
 							+ "in use and that it is not marked read-only.";
@@ -549,7 +555,21 @@ Zotero.Sync.Storage = new function () {
 						]) + "\n\n"
 							+ "Restarting your computer or disabling security "
 							+ "software may also help.";
-						throw (msg);
+						var e = new Zotero.Error(
+							msg,
+							0,
+							{
+								dialogButtonText: "Show File",
+								dialogButtonCallback: function () {
+									try {
+										file.reveal();
+									}
+									// Unsupported on some platforms
+									catch (e) {}
+								}
+							}
+						);
+						throw (e);
 					}
 					
 					throw (e);