Missing Dock's icons

Most of icons on Dock have vanished after updating Pages, Numbers, Keynote, iPhoto and iMovie.

I lost the icons in launchpad, too, but they were recovered by the following procedures:

$cd ~/Library/Application Support/Dock

$sudo rm *

$sudo killall Dock

When I experienced similar phenomina sevaral days ago,

I could recover all of them by the procedures.

However, I could not have recovered the icons on Dock since the update.

Regards,