PHP Error Dashboard php 5.3
Deprecated: Assigning the return value of new by reference is deprecated in .... (in different lines, maybe 100 errors) like: $this->sanitize =& new SimplePie_Sanitize;
I searched the error and found a lot of posts about php 5.3
i changed all "=& new" too "= new" and all errors away and the rss feed work
/usr/local/ispconfig/interface/lib/classes/simplepie.inc.php