Non-ascii permalink in IIS leads to "Nothing Found" results

[scdetailer]

On IIS 7 installs, there is a known issue in the FastCGI module in how it handles the REQUEST_URI server variable for non-ascii characters.

"IIS team is planning to provide an update for it soon." ... that was 18 months ago.

​http://ruslany.net/2009/05/iis-7-url-rewrite-module-support-in-wordpress-28/#comment-1707

Please include this workaround in the core's wp-config.php file:

if (isset($_SERVERUNENCODED_URL?))
$_SERVERREQUEST_URI? = $_SERVERUNENCODED_URL?;

Thank you!