Running two separate sites 3.1 RC3, exporting from one importing to the other. WordPress Importer version 0.2 brings in all the content, but all posts are untagged and uncategorized. Tags and categories are imported, but they are unassociated with any posts.
Also, the importer does not run on first try with 3.1. Clicking "upload" it alway hangs forever before getting to the user names. Stopping the browser and uploading again, it usually runs and finishes.