Index: branches/unlabeled/unlabeled-1.12.2/core/kernel/parser/tags.php
===================================================================
diff -u -r5899 -r5946
--- branches/unlabeled/unlabeled-1.12.2/core/kernel/parser/tags.php	(.../tags.php)	(revision 5899)
+++ branches/unlabeled/unlabeled-1.12.2/core/kernel/parser/tags.php	(.../tags.php)	(revision 5946)
@@ -260,6 +260,10 @@
 		// $tag->Prefix - l_TagProcessor
 		$tmp = $this->Application->processPrefix($this->Processor);
 
+		if (isset($this->NamedParams['_ignore_missing_'])) {
+			if (!$this->Application->prefixRegistred($tmp['prefix'])) return '';
+		}
+
 		$processor =& $this->Application->recallObject($tmp['prefix'].'_TagProcessor'); // $this->Processor
 
 		$tmp=explode('_',$tmp['prefix'],2);
@@ -383,7 +387,11 @@
 		}
 		else {
 			$prefix = $this->getPrefixSpecial();
+			if (isset($this->NamedParams['_ignore_missing_'])) {
+				if (!$this->Application->prefixRegistred($prefix)) return array();
+			}
 		}
+
 		$code[] = '$tmp = $application->processPrefix("'.$prefix.'");'."\n";
 
 		/*if (!isset($this->Application->CompilationCache[$this->getPrefixSpecial()])) {