I've gotten some reports from people that they've had problems using their blogging tool of choice to post to Windows Live Spaces using the MetaWeblog API. I haven't had any problems posting using W.Bloggar but have had some issues using Blogjet recently. I'd appreciate it if anyone else who's having issues posting to their blog responds with a comment to this blog post with information about which blogging tool you are using and what error message the tool reports.