The pear installation :
symony plugin-install http://plugins.symfony-project.com/sfUJSPlugin
seems to be broken :
>> plugin installing plugin "http://plugi...ymfony-project.com/sfUJSPlugin"
>> pear Could not download from
>> pear "http://plugins.symfony-project.com/sfUJSPlugin" (File
>> pear http://plugins.symfony-project.com:80/sfUJSPlugin not valid
>> pear (received: HTTP/1.0 404 Not Found
>> pear ))
>> pear Invalid or missing remote package file
>> pear Package "http://plugins.symfony-project.com/sfUJSPlugin" is
>> pear not valid