adjust logic of caching comments for _nocache

inc/parserutils.php

@@ -112,8 +112,7 @@ function p_cached_output($file, $format='xhtml', $id='') {
     } else {
         $parsed = p_render($format, p_cached_instructions($file,false,$id), $info);
 
-        if ($info['cache']) {
-            $cache->storeCache($parsed);               //save cachefile
+        if ($info['cache'] && $cache->storeCache($parsed)) {              // storeCache() attempts to save cachefile
             if($conf['allowdebug'] && $format=='xhtml') $parsed .= "\n<!-- no cachefile used, but created {$cache->cache} -->\n";
         }else{
             $cache->removeCache();                     //try to delete cachefile