Many of you are complaining about no avatars and signatures...well, they're there, you just have to enable them. Go to...
User CP -> Edit Options
Then scroll down a little bit and you will see...
Visible Post Elements
You have the option to show or hide various elements of messages, which may be of use to users on slow internet connections, or who want to remove extraneous clutter from posts.
Show Images (including attached images and images in [IMG] code)
Tick the above, and there you have it. From here you may also turn on PMs.