Yes, iWork updates worked perfectly. NTP, RAW and Safari updates don't.
I did also install NTP and RAW updates manually after downloading them from the official Apple links.
However, I don't want to install Safari unless it's provided from an official Apple download link as well.
Some users got the Safari update from MacUpdate or alike.
But I don't trust these .pkg files; not sure what else is included, MacKeeper or some annoying adware.
What's interesting: there seems to be a difference between Safari/NTP/RAW and the iWork updates.
In German, the button for the iWork apps said "Aktualisieren" while the button for the non-working apps says "Update".
These are 2 different words from the same thing -> updating.
But it shows that Apple treats the apps differently and I assume the problems are related to that one specific kind of updates.