HTTP status 500 on capcha validation

I’ve got paged by what was apparently a brute forcing attempt. The problem was Jetpack:

in jetpack/modules/protect/math-fallback.php, function generate_math_page is used to generate the challenge. It ends with wp_die( $mathage );

wp_die returns http 500 by default, thus making alerting panic, thinking it’s a server problem (it’s not).

Please fix this in the next release. It should be wp_die( $mathage, 401 ); I guess?