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The following article will help those using Windows Live Writer with WordPress. For more information and support, see the Windows Live Writer support forum.
Description: When attempting to publish a post that contains images, you get a dialog that starts with "The following images cannot be published because the weblog does not support image publishing." (Also affects Writer Beta 1.)
Reason and Solution: Very large XML-RPC requests (such as image uploads) that don't contain line breaks get truncated by the server in some configurations. Fixed in Beta 3.
Description: Weblog is configured to use non-UTF-8 encoding. Attempt to post results in error message “Blog Server Error. Parse error. Not well formed”. Posts from the web UI are fine.
Reason and Solution: PHP's XML parser does not support encodings besides UTF-8, ISO-8859-1, and US-ASCII. You must use one of these encodings. After changing the setting on your blog, you will need to force Writer to redetect your encoding by choosing the menu option Weblog | Edit Weblog Settings, clicking on the Update Account Configuration button, and stepping through the wizard.
Description: Blogs with the Bad Behavior plugin installed cannot be used with Windows Live Writer. Attempting to add the blog to Windows Live Writer results in a "403 (Forbidden)" error dialog.
Reason and Solution: See this blog post by James McKay for an explanation. Fixed in Beta 3.
Description: On blogs running PHP 5.2.2, trying to configure the blog in Writer gives the following error: Invalid Server Response - The response to the blogger.getUsersBlog method received from the weblog server was invalid. / Invalid response document returned from XmlRpc server (Also affects Writer Beta 1.)
Reason and Solution: A bug in PHP 5.2.2 causes POST data to be dropped. See this bug report for more details. As a workaround, add the following line to the top of your xmlrpc.php file:
$HTTP_RAW_POST_DATA = file_get_contents("php://input");
Description: On WordPress 2.1+ and PHP versions older than 5.0.2, publishing posts using Writer results in non-ASCII characters showing up as either squares or question marks.
Reason and Solution: Writer erroneously prepends the UTF-8 Byte Order Mark to XML-RPC requests that are UTF-8 encoded. This prevents WordPress from correctly detecting the UTF-8 encoding declaration, so ISO-8859-1 is assumed instead. Fixed in Beta 3. After upgrading to Beta 3, reconfigure your blog via Weblog | Edit Weblog Settings | Update Account Configuration, and step through the wizard.
Description: Attempting to open posts in Writer results in ArgumentOutOfRangeException.
Reason and Solution: A bug in Writer causes blog post parsing to fail when the post contains pre, script, and/or style tags. Fixed in Beta 3.