I encounterd two bugs in Zend_Service_Delicious. First: Trying: $posts = $delicious->getUserPosts('user'); As soon an german umlaut like ä,ü,ö exists in title, description or tag you get an error:

Fatal error: Uncaught exception 'Zend_Json_Exception' with message 'Illegal escape sequence 'u'' in....[ ]....\application\library\Zend\Json\Decoder.php on line 386

Seems to be more a problem with json_decode.

Second error/bug: When searching for posts from a user, assuming no german umlauts are given, so that the first error will not occur everything works fine when searching for a post and a tag like: $posts = $delicious->getUserPosts('user', 'null', 'webdesign');

But searching without a tag: $posts = $delicious->getUserPosts('user', '1', null); Error: Fatal error: Uncaught exception 'Zend_Service_Delicious_Exception' with message 'Http client reported an error: 'Not Found''

In /Zend/Service/Delicious.php line 494 changing $response = $this->_rest->restGet($path, $parms); to $response = $this->_rest->restGet(rtrim($path,'/'), $parms); would solve this error, since in line 78 const JSON_POSTS = '/feeds/json/%s/%s'; has an ending slash in the url when no tag is given. Delicious feed seems to no like an ending slash.