filter_xss() does not handle direct descendant CSS selectors well within inline CSS

I also hit this issue with a piece of HTML inside a CSS comment, as seen in http://cvs.drupal.org/viewvc.py/drupal/contributions/modules/cck/theme/c...

/* CSS overrides for Views-based autocomplete results.
  - #autocomplete uses "white-space:pre", which is no good with
    Views' template-based rendering
  - Field titles are rendered with <label> in default templates,
    but we don't want the 'form' styling it gets under .form-item
*/
.form-item #autocomplete .reference-autocomplete {
  white-space:normal;
}

After <label> the rest of the contents of the <style> element are returned as text (in this case it's mimemail module that moves the CSS file into a <style> element, in case you're wondering).

Closed. The reason: expired.