Something was changed there in version 0.5.5.
Problem: In my MODx module (the CMS I use) I'd like to display a few widgets. The token_auth-Method seems to be too slow to display 4 widgets on a page.
My Solution: At the start the MODx module is logged into Piwik via &module=Login&action=logme&login=(md5-Password) and was redirected back by the &url-Parameter to the MODx module page to display the widgets.
Bug/Feature(?): This is somehow broken in 0.5.5. Any solution for this?
(In ) fixes #1257 - logme regression with url=parameter for redirects; temporary workaround: use form_url=parameter