WordPress 3.0.2 is out and since it contains security fixes, an update is recommended. The German WordPress version is also already available and the update went smoothly for me. I only had to replace all occurrences of Gallerie with Galerie in the language file to make the special handling of gallery posts work (and because Gallerie just looks stupid and is wrong - I don't understand why it's still in the language file. I reported this and it was allegedly fixed a long time ago. Well ...)