Index: umc/app.js
===================================================================
--- umc/app.js	(Revision 68171)
+++ umc/app.js	(Arbeitskopie)
@@ -1552,7 +1552,7 @@
 			domClass.toggle(favoritesCategory._button.domNode, 'favoritesHidden', emptyFavorites);
 
 			// take the first visible category as fallback for the last selected one
-			this._lastCategory = emptyFavorites ? this.getCategories()[1] : favoritesCategory;
+			this._lastCategory = emptyFavorites ? this.getCategories().filter(function(category) {return category['id'] != '_favorites_'})[0] : favoritesCategory;
 
 			// spread category buttons over whole width
 			styles.insertCssRule('.umc .umcCategoryBar .dijitButton', lang.replace('width: {0}%', [100.0 / this.getCategories().length]));