PROBLEM blog posts only work when logged in as admin

[gilles]

Nice to know it's not an issue with 3.1, thank you for telling.

As you use I18N, please tell me how your URLs look like. Do they have something like ?lang=xx appended? What about the URLs of posts? (even if they return 404 errors) Just some examples, I don't need the full URLs.

Normal pages use fancy urls:
http://gillesvaneeden.nl/gitaarles/vragen/

Blogs use querystring:
http://gillesvaneeden.nl/blog/?post=sandy-denny

Oh and for now there's only one default language, Dutch. So I have no language specific pages. I did test setting everything back to english (site and News Manager) but with no different result.