language selector does not point to translated item

Hi,

I am still struggeling getting LinguaPlone to work on my Plone site.

I have set up two language root folders "/de" (for German) and "/en"
using "/@@language-setup-folders". I've created a folder in each,
"/de/texte/" and "/en/articles" and definded the latter as translation
of the former.

In "portal_languages" in the ZMI I have set:

- Allowed languages: English, German
- Negotiation Scheme: [x] Use cookie for manual override
- all other options are unchecked

I do get a language selector rendered, but "English" links
to "/de/texte/switchLanguage?set_language=en". When I click on that, I
get an English UI, but the location is still "/de/texte" instead of
"/en/articles".

Buildout runs flawlessly without reporting errors, as does the rest of
my Plone site.

A helpful soul at stackoverflow.com suspects that the LinguaPlone
override of the language selector does not work for some reason.[1]

How do I configure LinguaPlone to link to the correct translation in
the language selector? What could be my mistake / misconfiguration?

Versions:
- Plone 4.0.2
- Zope 2.12.13
- LinguaPlone 4.0

Thanks a lot,

        Florian

[1]
http://stackoverflow.com/questions/5564329/switchlanguage-does-not-load-translated-item-using-linguaplone/5572486#5572486

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