Thanks for the answer, Kafkaesqui!
In case anyone finds this later, and wonders about the changes between 2.05 and 2.1, the latter version has three more fields in wp_categories, namely link_count, posts_private and links_private. The wp_linkcategories table has been replaced with the wp_link2cat table. Then there’s the post_type type changing from varchar(100) to varchar(20) in wp_posts.
Perhaps there were other, subtle changes but I only focused on what would mean something for my import.
