I just installed 1.5.2 from the Sqirrelmail web site. I just received HTML formatted messages from Discover Card and American Express. Neither displays correctly. The message body appears pushed most of the way to the right, and is largely unreadable. The same messages render fine in Thunderbird v10.0
Squirrelmail is otherwise working as expected and appears to work properly with simpler messages.
I can forward the messages to a developer for debug if needed.