Many different Squirrelmail pages all have the same HTML <TITLE>,
which makes it very difficult to distinguish them when open in
multiple browser tabs.
Please make sure every different Squirrelmail page has a different
title, not only if it is looking at a folder, but even for different
messages from different parties.
Seen at least in version 1.4.21, which is the newest there at Dreamhost.
Probably won't implement until 1.5.x or later.
If someone tries implementing this, note that the page title can be overridden by some plugins (Login Manager and New Mail being the most common, in which case the username and/or number of new messages are placed in the title). It would be best to retain this functionality.
Message view pages now use the message subject in the page title; suggestions for other pages are welcome.