We recently introduced some changes to how we handle raw HTML input in Basecamp.
In most of Basecamp, HTML input will remain the same. Messages, comments, to-do items, and the system Overview message still allow HTML as they always have.
But elsewhere in the app, we are now escaping HTML. That means HTML tags will not be interpreted by the browser. So if you type "<b>hello</b>", you'll see the tags in the message text instead of an actually bolded hello.
We made this change because HTML has often led to broken pages and it raises security risks. We appreciate your understanding and thank you for your continued support.