Default Android 4 -> Graphical glitches at the bottom

Used the Seach-function, but didnt really found my problem:
In every android 4 version, doesnt matter which version from which mod i use, my display flickers like hell, in some Apps more in some apps less.... Whatsapp is hardly useable, but absolutely not comfortable with this bug.

The handy seems to push everything from bottom, like keyboard or symbols, about 2-4cm upward, and the content which was there before, gets cutted away in this moment.

This happens in a form of flickering, the bottom of the displays "jumps" up- and down- and up- and downward ...
This happens also in App-browser.... And in market, when showing an App, when i see the pictures of the app, if i scroll downward to the comments for this app, the flickering stopps completely.

Deactivated 16bit transparency, which could cause scrolling bugs.
And i also deactivated the 2D Hardware-Acceleration FORCE in Developer-options..
Flashed with Clockwork 6.0.0.0 .... have 210MB for sys and 174mb for data .... No apps installed but whatsapp (stopped working with android 4 cause without whatsapp i dont have any need for this handy )

Does anybody have a clou here ?
Greetings