Thanks, int_ua. I use CSSU Tuner to make editing transition.ini easier. Changing zoom didn't do it, neither did changing any other parameter. But following your reply, I checked my /usr/share/hildon-desktp directory and found two files: new, 202B long transition.ini and 2 weeks old, 2kB long transition.ini.precssu. Deleting the new one and renaming the old one back to transition.ini did the trick.

Now, how about that maemo-optify-runonce?