Kaede,
There is currently an issue where the chatter component and rich text fields don’t play nice together (if both are on a page the rich text palette doesn’t show up). We’ll let you know once a future release fixes this, but in the meantime, the best workaround is to show the Chatter component in an iframe in a template component. You can see an example of how to do that on this post.
Sorry for the inconvenience!
