Visiting https://meta.security.stackexchange.com
displays an HTTPS certificate error in Google Chrome and Internet Explorer 10.
For reference, meta.<sitename>.stackexchange.com
is the old URL for per-site metas. Child metas were migrated to <sitename>.meta.stackexchange.com
during the implementation of network-wide HTTPS support. The old URLs were configured to silently redirect users to the correct page.
This issue has technically been reported a few times before, (1, 2, 3, 4, 5). However, these reports were made before HTTPS support for child metas was officially completed in March 2017.