I got a comment from a user claiming that the Facebook chat fix I posted earlier no longer works. I downloaded the latest version, 2.7.11, and got to configuring.
First, in your buddy list window, select Accounts > Manage Accounts (Ctrl+A), then click Add…
Next, select Facebook Chat (XMPP) and make your configuration match the one below, using your username. If you are confused on this, your Facebook username is whatever comes after the / in your Facebook URL. For example, mine is www.facebook.com/kylebubp so my username is kylebubp. If you aren’t sure what your username is, login to Facebook and click on Profile in the top right. Your URL will be displayed in your address bar.
Next, click on the Advanced tab. Make your settings match these:
That’s it. Click add and you should be good to go. If you need assistance, comment and I will email or reply in the comments.