Problem to post from Microsoft's Windows Live Writer to Blogger (blogspot): The server reported an error with the following web address: 500 Internal Server Error bX-7sd12g.
It is also problem to open posts from WLW.
Workaround for now is to use the the Blogger website.
It seems also to work to post a draft from WLW and then post it from the web interface in Blogger.
Hopefully Google comes with a solution to this bug soon.
Update: Another bug is that the url created contains the first words from the post and not from the title as it should.
Update 2: A intermediate fix that works with Windows Live Writer is to make the post as usual in WLW, including images and then click on "Post draft to blog", ignore any errors, then click on "Publish" and ignore the errors. This will solve both the url problem and the post will be posted to your blog.
This problem also exist with other blog applications and it might work with the same workarounds too.
Update 3: November 23 and the issue with posting and opening blogs is fixed as well as the issue with the url.