Index: trunk/core/kernel/languages/phrases_cache.php
===================================================================
diff -u -N -r2628 -r2720
--- trunk/core/kernel/languages/phrases_cache.php	(.../phrases_cache.php)	(revision 2628)
+++ trunk/core/kernel/languages/phrases_cache.php	(.../phrases_cache.php)	(revision 2720)
@@ -79,6 +79,8 @@
 			$label = substr($label, 1, -1); //cut exclamation marks
 		}
 		
+		if( strlen($label) == 0 ) return '';
+		
 		$original_label = $label;
 		$label = strtoupper($label);
 		if( isset($this->Phrases[$label]) )