ORIGINAL: PilotLight
Did you try to turn the Gain pot counterclockwise? Mine twitched too after adjusting the trim pot, but when I reduced the gain, it stopped. Some batteries have a very small amount of twitch, but I have just let it go till next battery.
Lowering the gain will make the glitch go away. It's called tail wagging. High gain settings will cause the tail to wag.
The Blade CP has a gain pot and a trim pot so the Blade's gyro is much better, but unfortunatle the Blade CP is just not much of a heli.
The Axe is a much better platform to work on.