Multilingual redirect fatal error !! Help !!

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So... strangest error yet. When I'm logged in to my site and visit the root URL (witch should redirect me to my native language) I got a fatal error everytime. It did disapear when I relog it seems but someone might want to look into it.

 
Remo replied on at Permalink Reply
Remo
it's a bit hard to look into this, it definitely works for us on more than a hundred sites..

Could you at least post the error message you get? Thanks