The title is my question. I have a customer who is using the WP NextGEN plug-in and has more then 10k pictures in his WP installation. The import of the WP posts, categories, tags and so on is working like a charme. But the posts always just consist of the NextGEN output (something like [singlepic id=11203 h=400]).

Has every anybody tried to migrate the contents of the NextGEN plug-in? If so, how did the migration worked?