i think we need to add forward slash "/" to the line 115 and 116 for compatibility with v1.7.8
search for
$link_args = ereg_replace("&".$this->page_text."=[0-9]*", "", $link_args);
$link_args = ereg_replace($this->page_text."=[0-9]*&", "", $link_args);
replace with
$link_args = preg_replace("/&".$this->page_text."=[0-9]*/", "", $link_args);
$link_args = preg_replace("/".$this->page_text."=[0-9]*&/", "", $link_args);