<p>Well, after reading the manual almost from the beginning I realized that I turned on the Quick Focus function.<br>
Turning it off canceled the "problem" I experienced.<br>
Now every thing is in order.<br>
But reading most of the manual I learned that it is not recommended to use the live view for long periods and that doing so and taking pictures during live view is on, might cause poor picture result.<br>
So, for those that use the live view a lot, like me, be careful.</p>