The syntax of the rss-feed did change as you moved to the new server, right? Could you please change line 303 in /docs/autoupdate/l_phpidsUpdate.php from

if (preg_match("/<pubDate>([^<]+)<\/pubDate>/", $content, $match)) {

to

if (preg_match("/<updated>([^<]+)<\/updated>/", $content, $match)) {

Another bugfix please:
All occurencies of $hash_cache in getCurrentFileHash() (line 141) to $this->hash_cache

thanx