A fix has been committed on the 2.2 branch as noted at https://bugs.launchpad.net/mailman/+bug/266467. As a list member, all you can do is ask the Mailman site admins at the sites that host the lists you read to modify the article.html template with the mods indicated in the bug report, place the modified template(s) in templates/site/<language>/article.html and restart Mailman.

Update: As of Mailman 2.1.13, this is in the standard distribution.

MailmanWiki: DOC/4.48 How can I change the HTML or .txt templates used by my mailing lists?/0001 (last edited 2016-07-31 05:02:47 by msapiro)