Using the Zend controller url helper doesn't work on the base URL
===

for example, if the current url is:

http://www.example.com/user/index/index/foo-id/123

    $this->_helper->url(array('bar-id' => 456))

will output:

http://www.example.com/user/index/index/foo-id/123/bar-id/456

but if the current url is:

http://www.example.com/

then the same helper call

    $this->_helper->url(array('bar-id' => 456))

will output:

http://www.example.com/

why is the bar-id parameter not added to the url in the second case?

