cada vez que uso el boton rss me aparece este error:

Strict Standards: Non-static method FeedCreator::iTrunc() should not be called statically, assuming $this from incompatible context in /homepages/29/d247938283/htdocs/include/feedcreator.class.php on line 312

Warning: Cannot modify header information - headers already sent by (output started at /homepages/29/d247938283/htdocs/include/feedcreator.class.php:312) in /homepages/29/d247938283/htdocs/include/feedcreator.class.php on line 645

Warning: Cannot modify header information - headers already sent by (output started at /homepages/29/d247938283/htdocs/include/feedcreator.class.php:312) in /homepages/29/d247938283/htdocs/include/feedcreator.class.php on line 646
Blog de noticias ?/blog Sun, 01 Dec 2013 21:12:21 +0000 FeedCreator 1.7.2 /?/blog/id/1 Thu, 01 Jan 1970 00:00:00 +0000 1385669335
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y esta es la linea 312:
$result = FeedCreator::iTrunc(htmlspecialchars($this->rawFieldContent),$this->truncSize);

Alguien puede ayudarme, aunque trato de ser autodidacta, mis conocimientos son limitados.
Uso la versión 2.5.

Gracias por vuestra ayuda.