I am having problems with the mouse look it seems jittery with look compared to other clients. I am not sure why it does this.
From the getting started Wiki: The recommended frame rate for MaxMouseLookFPS is 60 (or 30) to avoid mouse look issues. It's 0 (unlimited FPS) by default. Very high frame rates will make mouse look less usable. However you can change these if desired. You may want a higher background FPS for better autofollowing. These features (among other fixes) are a part of the latest eqgame.dll you would have downloaded under the Obtaining the Client Section for Windows.
This seems to be my experience with the "follow" 3rd party camera after hitting F9 twice, regardless of any settings I can find. It's just shaky, and I can't abide it. Other people have reported being unbothered by it.