Comment 1 for bug 266273

It looks like a few people (eg on Sourceforge) have reported that the suspicious HTML check is too suspicious since it was introduced in version 2.1.9; for instance rejecting innocent META tags. Also, it links to http://wiki.list.org/x/jYA9 for more information, but there is no information there about the reasons for rejection leading to frustration for the list owner.

"The page you saved contains suspicious HTML that could potentially expose your users to cross-site scripting attacks. This change has therefore been rejected. If you still want to make these changes, you must have shell access to your Mailman server.
See FAQ 4.48."

Could either the list of "badwords" be moved to Defaults.py, or there be an option to say that we trust list owners to edit their own HTML?

I've worked around by hacking /usr/lib/mailman/Mailman/Cgi/edithtml.py line 162.