I like Windows Live Writer. Its very intuitive, and a great way of writing posts, even when your not online, so obviously i'm using it for this blog running dasBlog.

But during the posting of my second post, i ran in to the first problem with it. I wrote the post, read it a few times, and decided to post it. After posting I checked the post on the site, to make sure it looked right, and realized that i forgot to include a picture. So what do I do? I was logged in on the site, so i just pushed the delete icon on the webpage, and it was gone.

Great, i thought. I added my picture, and pressed publish to weblog again. But then i got the "Server error 0, Object reference not set to an instance of an object". And whatever i tried, i didn't seem to be able to upload my edited post.

It turns out that this is a know bug. If you create a post, and you delete from the Blogs userpanel, Live Writer will still have en ID associated with the post, and when trying to update, to a post ID that doesn't exist ... well you get the picture.

My workaround was to create a new post, and copy the contents to this new post, and publish that instead, and then delete the faulty draft.

Alternatively, according to a post on Peter Laudati's blog you can switch to another blog in Live Writer, if you have another configured, and then back to the original blog - this will reset the ID, and you will be able to republish as a new post. I haven't tried that approach though, but it makes sense.