Hmm, maybe you are missing the texture for the chatbox?
Could you show us a screenshot?
Try changing your rendering subsystem.
The absolute First thing you want to try is to change the rendering mode for the game. There's different rendering modes you can pick from, usually OpenGL and Direct3D9. This decides which way your graphic card should process the game. This one is at standard set to OpenGL, so we'd want to set it to Direct3D9.
There's 2 ways you can change this setting.
How to fix it!
Either you start the game, go into the options menu, click the Video tab, and then change the rendering subsystem and restart the game.
Sometimes you aren't able to even enter the game, and all you can hear is the menu music, or it just crashes directly after launch. Those who experience this can enter the feralheart folder located in C:\FeralHeart at standard, find the file called "Ogre.cfg" and open it with wordpad.
This file works just as the ingame options menu, but instead of buttons and sliders, there's text.
What we're interested in is the top row
(http://i55BannedImageSite/260vkwl.png)
Set the top row text so it is just like in the picture with the text
Render System=Direct3D9 Rendering Subsystem
Save the file, and close it. Next time you run the game it should boot with the new settings you applied.