Why is it that diary-block entries that I enter by hand (to save time) do not display properly under the emacs calendar app, but they do if I enter them the "official" way by marking a block of days on the calendar display and entering "i b" and all that stuff? The resulting diary file is supposed to be plain text yes? And the two entries, mine by hand and from emacs look identical, character for character.

%%(diary-block 9 10 2012 9 30 1012) Bob's trip to LA
%%(diary-block 9 10 2012 9 30 2012) Bob's trip to LA

So why does the one version show up, and the other doesn't?