Dates only display properly for latest post

Hi all…

It’s easier for me to show the problem than it is to explain it: http://www.kame-house.net/tibet/index.php

As you can see, the date only displays properly for the first post. Earlier posts only display an empty box.

I’m using the “Travelogue” theme by Josh Lyman, which I modified, so I probably screwed something up. Also, several of these posts were made on the same day.

Can anyone tell me what’s wrong and how to fix it?

Thanks in advance!