Version: (using KDE 4.2.0) In both ways (zoom in and out) such zoom that only one pixel would be visible. This way user would no longer me limited to artificial values. Of course now it is possible to get big zoom but with a lot of work -- making screenshot, zooming in in gwenview or gimp, so it is not useful in everyday work.
*** This bug has been marked as a duplicate of bug 148527 ***