I found out a bug when I was paying on the World of Minecraft Client 2.0.5.

When pressing ESC, entering the Options menu, then enter the Controls menu,

and get back to the Options menu by clicking 'Done', the Options buttons malfunction. This causes these problems:

-Music, Sound, Show FPS, 3d anaglyph, limit Framerate, view Bobbing and Invert mouse buttons can be pressed, but nothing happens.

The Render Distance button can be pressed and switched, but only in these 2 ways:

Far - Short - Far etc., Normal - Tiny - Normal etc.

The other buttons, 'Done' and 'Controls', can be pressed and they work normally.

I hope that you can fix this bug.