After the last system update the ctrl + left/right arrow command on zsh terminal doesn't do anything. Also ctrl+ u has something wrong because usually that command erase from the cursor to the beginning of the line, while now erase entire line.. Someone knows how to solve these problems? thank you all.
Ctrl+U is most likely because you've got the cursor at the end of the line. Secondly, which version of Gentoo are you referring to as the "last system update"?
And what would you like the ctrl+left/right to do?
Note: If the config works but the supposed keys doesn't do what you want it's perhaps because the key-definition differs from yours and mine, do:
Terminal used: Konsole.
To solve : right click on terminal (or settings in menubar) -> change current profile -> keyboard mapping -> change to Default (xfree4)