Mouse motion event holds up the input

[Yuri]

This started from some system update.

There are some strange dependencies on mouse motion event. For example, 
when google is open in chromium and I click on some search choice, it 
only goes there after I move the mouse, click itself is not enough.

Same when I press "Ctrl-Alt-F1", it only goes to the black terminal when 
I move the mouse.
Another symptom that I think is related is that doubleclick on the word 
in konsole in kde4, and in all browsers, isn't selecting the word as it 
should.

I have rebuilt kde4 with all dependencies and it didn't help.

What might be the problem?

Yuri