diff --git a/chrome/content/zotero/overlay.js b/chrome/content/zotero/overlay.js
index dd4e83923..aff3fc0dc 100644
--- a/chrome/content/zotero/overlay.js
+++ b/chrome/content/zotero/overlay.js
@@ -1863,8 +1863,8 @@ var ZoteroPane = new function()
 	
 	// Adapted from: http://www.xulplanet.com/references/elemref/ref_tree.html#cmnote-9
 	this.onTreeClick = function (event) {
-		// We only care about primary button double-clicks
-		if (!event || event.detail != 2 || event.button != 0) {
+		// We only care about primary button double and triple clicks
+		if (!event || (event.detail != 2 && event.detail != 3) || event.button != 0) {
 			return;
 		}
 		
@@ -1885,25 +1885,53 @@ var ZoteroPane = new function()
 		}
 		
 		if (tree.id == 'zotero-collections-tree') {
-			var itemGroup = ZoteroPane.collectionsView._getItemAtRow(ZoteroPane.collectionsView.selection.currentIndex);
+			// Ignore triple clicks for collections
+			if (event.detail != 2) {
+				return;
+			}
+			
+			var itemGroup = ZoteroPane.collectionsView._getItemAtRow(tree.view.selection.currentIndex);
+			if (itemGroup.isLibrary()) {
+				var uri = Zotero.URI.getCurrentUserLibraryURI();
+				if (uri) {
+					ZoteroPane.loadURI(uri, event);
+					event.stopPropagation();
+				}
+				return;
+			}
+			
 			if (itemGroup.isSearch()) {
 				ZoteroPane.editSelectedCollection();
+				return;
 			}
-			else if (itemGroup.isGroup()) {
+			
+			if (itemGroup.isGroup()) {
 				var uri = Zotero.URI.getGroupURI(itemGroup.ref, true);
 				ZoteroPane.loadURI(uri, event);
 				event.stopPropagation();
+				return;
 			}
-			else if (itemGroup.isHeader()) {
+			
+			if (itemGroup.isHeader()) {
 				if (itemGroup.ref.id == 'group-libraries-header') {
 					var uri = Zotero.URI.getGroupsURL();
 					ZoteroPane.loadURI(uri, event);
 					event.stopPropagation();
 				}
+				return;
 			}
 		}
 		else if (tree.id == 'zotero-items-tree') {
-			if (ZoteroPane.itemsView && ZoteroPane.itemsView.selection.currentIndex > -1) {
+			// Expand/collapse on triple-click
+			if (event.detail == 3) {
+				tree.view.toggleOpenState(tree.view.selection.currentIndex);
+				return;
+			}
+			
+			// Don't expand/collapse on double-click
+			event.stopPropagation();
+			
+			if (tree.view && tree.view.selection.currentIndex > -1) {
 				var item = ZoteroPane.getSelectedItems()[0];
 				if (item) {
 					if (item.isRegularItem()) {
@@ -1934,7 +1962,6 @@ var ZoteroPane = new function()
 						}
 						if (uri) {
 							ZoteroPane.loadURI(uri, event);
-							//event.stopPropagation();
 						}
 					}
 					else if (item.isNote()) {
diff --git a/chrome/content/zotero/xpcom/data/item.js b/chrome/content/zotero/xpcom/data/item.js
index 93650a537..e49409ea8 100644
--- a/chrome/content/zotero/xpcom/data/item.js
+++ b/chrome/content/zotero/xpcom/data/item.js
@@ -2933,18 +2933,19 @@ Zotero.Item.prototype.getBestSnapshot = function() {
 		throw ("getBestSnapshot() can only be called on regular items");
 	}
 	
-	if (!this.getField('url')) {
+	var url = this.getField('url');
+	
+	if (!url) {
 		return false;
 	}
 	
-	var sql = "SELECT IA.itemID FROM itemAttachments IA NATURAL JOIN items I "
+	var sql = "SELECT IA.itemID, value FROM itemAttachments IA NATURAL JOIN items I "
 		+ "LEFT JOIN itemData ID ON (IA.itemID=ID.itemID AND fieldID=1) "
-		+ "NATURAL JOIN ItemDataValues "
-		+ "WHERE sourceItemID=? AND linkMode=? AND value=? "
-		+ "ORDER BY dateAdded DESC LIMIT 1";
+		+ "NATURAL JOIN itemDataValues WHERE sourceItemID=? AND linkMode NOT IN (?) "
+		+ "AND IA.itemID NOT IN (SELECT itemID FROM deletedItems) "
+		+ "ORDER BY value=? DESC, mimeType='application/pdf' DESC, dateAdded ASC";
 		
-	return Zotero.DB.valueQuery(sql, [this.id,
-		Zotero.Attachments.LINK_MODE_IMPORTED_URL, {string:this.getField('url')}]);
+	return Zotero.DB.valueQuery(sql, [this.id, Zotero.Attachments.LINK_MODE_LINKED_URL, url]);
 }
 
 
diff --git a/chrome/content/zotero/xpcom/uri.js b/chrome/content/zotero/xpcom/uri.js
index b26c7a4f3..cc03e94c8 100644
--- a/chrome/content/zotero/xpcom/uri.js
+++ b/chrome/content/zotero/xpcom/uri.js
@@ -12,6 +12,15 @@ Zotero.URI = new function () {
 	}
 	
 	
+	this.getCurrentUserLibraryURI = function () {
+		var userID = Zotero.userID;
+		if (!userID) {
+			return false;
+		}
+		return _baseURI + "users/" + userID + "/items";
+	}
+	
+	
 	this.getLibraryURI = function (libraryID) {
 		var libraryType = Zotero.Libraries.getType(libraryID);
 		switch (libraryType) {