diff --git a/chrome/content/zotero/xpcom/collectionTreeView.js b/chrome/content/zotero/xpcom/collectionTreeView.js
index e56fad337c..008970335f 100644
--- a/chrome/content/zotero/xpcom/collectionTreeView.js
+++ b/chrome/content/zotero/xpcom/collectionTreeView.js
@@ -1767,6 +1767,23 @@ Zotero.CollectionTreeView.prototype.cycleHeader = function(column)					{ }
 ///
 ////////////////////////////////////////////////////////////////////////////////
 
+Zotero.ItemGroupCache = {
+	"lastItemGroup":null,
+	"lastTempTable":null,
+	"lastSearch":null,
+	"lastResults":null,
+	
+	"clear":function() {
+		this.lastItemGroup = null;
+		this.lastSearch = null;
+		this.lastTempTable = null;
+		if(this.lastTempTable) {
+			Zotero.DB.query("DROP TABLE "+this.lastTempTable);
+		}
+		this.lastResults = null;
+	}
+};
+
 Zotero.ItemGroup = function(type, ref)
 {
 	this.type = type;
@@ -1947,24 +1964,8 @@ Zotero.ItemGroup.prototype.getItems = function()
 			return [];
 	}
 	
-	var s = this.getSearchObject();
-	
-	// FIXME: Hack to exclude group libraries for now
-	if (this.isSearch()) {
-		var currentLibraryID = this.ref.libraryID;
-		if (currentLibraryID) {
-			s.addCondition('libraryID', 'is', currentLibraryID);
-		}
-		else {
-			var groups = Zotero.Groups.getAll();
-			for each(var group in groups) {
-				s.addCondition('libraryID', 'isNot', group.libraryID);
-			}
-		}
-	}
-	
 	try {
-		var ids = s.search();
+		var ids = this.getSearchResults();
 	}
 	catch (e) {
 		Zotero.DB.rollbackAllTransactions();
@@ -1975,6 +1976,40 @@ Zotero.ItemGroup.prototype.getItems = function()
 	return Zotero.Items.get(ids);
 }
 
+Zotero.ItemGroup.prototype.getSearchResults = function(asTempTable) {
+	if(Zotero.ItemGroupCache.lastItemGroup !== this) {
+		Zotero.ItemGroupCache.clear();
+	}
+	
+	if(!Zotero.ItemGroupCache.lastResults) {
+		var s = this.getSearchObject();
+	
+		// FIXME: Hack to exclude group libraries for now
+		if (this.isSearch()) {
+			var currentLibraryID = this.ref.libraryID;
+			if (currentLibraryID) {
+				s.addCondition('libraryID', 'is', currentLibraryID);
+			}
+			else {
+				var groups = Zotero.Groups.getAll();
+				for each(var group in groups) {
+					s.addCondition('libraryID', 'isNot', group.libraryID);
+				}
+			}
+		}
+		
+		Zotero.ItemGroupCache.lastResults = s.search();
+		Zotero.ItemGroupCache.lastItemGroup = this;
+	}
+	
+	if(asTempTable) {
+		if(!Zotero.ItemGroupCache.lastTempTable) {
+			Zotero.ItemGroupCache.lastTempTable = Zotero.Search.idsToTempTable(Zotero.ItemGroupCache.lastResults);
+		}
+		return Zotero.ItemGroupCache.lastTempTable;
+	}
+	return Zotero.ItemGroupCache.lastResults;
+}
 
 /*
  * Returns the search object for the currently display
@@ -1982,6 +2017,14 @@ Zotero.ItemGroup.prototype.getItems = function()
  * This accounts for the collection, saved search, quicksearch, tags, etc.
  */
 Zotero.ItemGroup.prototype.getSearchObject = function() {
+	if(Zotero.ItemGroupCache.lastItemGroup !== this) {
+		Zotero.ItemGroupCache.clear();
+	}
+	
+	if(Zotero.ItemGroupCache.lastSearch) {
+		return Zotero.ItemGroupCache.lastSearch;
+	}	
+	
 	var includeScopeChildren = false;
 	
 	// Create/load the inner search
@@ -2040,6 +2083,8 @@ Zotero.ItemGroup.prototype.getSearchObject = function() {
 		}
 	}
 	
+	Zotero.ItemGroupCache.lastItemGroup = this;
+	Zotero.ItemGroupCache.lastSearch = s2;
 	return s2;
 }
 
@@ -2060,18 +2105,22 @@ Zotero.ItemGroup.prototype.getChildTags = function() {
 			return false;
 	}
 	
-	var s = this.getSearchObject();
-	return Zotero.Tags.getAllWithinSearch(s);
+	return Zotero.Tags.getAllWithinSearch(this.getSearchObject(),
+		undefined, this.getSearchResults(true));
 }
 
 
 Zotero.ItemGroup.prototype.setSearch = function(searchText)
 {
+	if(searchText !== this.searchText) {
+		Zotero.ItemGroupCache.clear();
+	}
 	this.searchText = searchText;
 }
 
 Zotero.ItemGroup.prototype.setTags = function(tags)
 {
+	Zotero.ItemGroupCache.clear();
 	this.tags = tags;
 }
 
diff --git a/chrome/content/zotero/xpcom/data/tags.js b/chrome/content/zotero/xpcom/data/tags.js
index 6e0c94b498..9d82a20610 100644
--- a/chrome/content/zotero/xpcom/data/tags.js
+++ b/chrome/content/zotero/xpcom/data/tags.js
@@ -199,23 +199,25 @@ Zotero.Tags = new function() {
 	 *
 	 * _types_ is an optional array of tag types to fetch
 	 */
-	function getAllWithinSearch(search, types) {
+	function getAllWithinSearch(search, types, tmpTable) {
 		// Save search results to temporary table
-		try {
-			var tmpTable = search.search(true);
-		}
-		catch (e) {
-			if (typeof e == 'string'
-					&& e.match(/Saved search [0-9]+ does not exist/)) {
-				Zotero.DB.rollbackTransaction();
-				Zotero.debug(e, 2);
+		if(!tmpTable) {
+			try {
+				var tmpTable = search.search(true);
 			}
-			else {
-				throw (e);
+			catch (e) {
+				if (typeof e == 'string'
+						&& e.match(/Saved search [0-9]+ does not exist/)) {
+					Zotero.DB.rollbackTransaction();
+					Zotero.debug(e, 2);
+				}
+				else {
+					throw (e);
+				}
+			}
+			if (!tmpTable) {
+				return {};
 			}
-		}
-		if (!tmpTable) {
-			return {};
 		}
 		
 		var sql = "SELECT DISTINCT tagID, name, type FROM itemTags "
@@ -226,7 +228,9 @@ Zotero.Tags = new function() {
 		}
 		var tags = Zotero.DB.query(sql);
 		
-		Zotero.DB.query("DROP TABLE " + tmpTable);
+		if(!tmpTable) {
+			Zotero.DB.query("DROP TABLE " + tmpTable);
+		}
 		
 		if (!tags) {
 			return {};
diff --git a/chrome/content/zotero/xpcom/itemTreeView.js b/chrome/content/zotero/xpcom/itemTreeView.js
index 4d7a4e4101..451fe22fdb 100644
--- a/chrome/content/zotero/xpcom/itemTreeView.js
+++ b/chrome/content/zotero/xpcom/itemTreeView.js
@@ -63,6 +63,7 @@ Zotero.ItemTreeView.prototype.addCallback = function(callback) {
 
 Zotero.ItemTreeView.prototype._runCallbacks = function() {
 	for each(var cb in this._callbacks) {
+		this.showLoadingMessageIfNecessary();
 		cb();
 	}
 }
diff --git a/chrome/content/zotero/xpcom/search.js b/chrome/content/zotero/xpcom/search.js
index 09b1c4b23f..95b388ed7a 100644
--- a/chrome/content/zotero/xpcom/search.js
+++ b/chrome/content/zotero/xpcom/search.js
@@ -651,7 +651,7 @@ Zotero.Search.prototype.search = function(asTempTable){
 				return false;
 			}
 			
-			var tmpTable = this._idsToTempTable(ids);
+			var tmpTable = Zotero.Search.idsToTempTable(ids);
 		}
 		// Otherwise, just copy to temp table directly
 		else {
@@ -720,7 +720,7 @@ Zotero.Search.prototype.search = function(asTempTable){
 				if (joinMode == 'any') {
 					if (!tmpTable) {
 						Zotero.DB.beginTransaction();
-						var tmpTable = this._idsToTempTable(ids);
+						var tmpTable = Zotero.Search.idsToTempTable(ids);
 					}
 					
 					var sql = "SELECT itemID FROM items WHERE "
@@ -839,7 +839,7 @@ Zotero.Search.prototype.search = function(asTempTable){
 	if (this.hasPostSearchFilter() &&
 			(includeParentsAndChildren || includeParents || includeChildren)) {
 		Zotero.DB.beginTransaction();
-		var tmpTable = this._idsToTempTable(ids);
+		var tmpTable = Zotero.Search.idsToTempTable(ids);
 		
 		if (includeParentsAndChildren || includeParents) {
 			//Zotero.debug("Adding parent items to result set");
@@ -890,7 +890,8 @@ Zotero.Search.prototype.search = function(asTempTable){
 	}
 	
 	if (asTempTable) {
-		return this._idsToTempTable(ids);
+		var table = Zotero.Search.idsToTempTable(ids);
+		return table;
 	}
 	
 	return ids;
@@ -951,7 +952,7 @@ Zotero.Search.prototype._prepFieldChange = function (field) {
 /*
  * Batch insert
  */
-Zotero.Search.prototype._idsToTempTable = function (ids) {
+Zotero.Search.idsToTempTable = function (ids) {
 	var tmpTable = "tmpSearchResults_" + Zotero.randomString(8);
 	
 	Zotero.DB.beginTransaction();