table created in Drupal 6.34, but not fields in table

In the course of working on the Drupal 7 port, I encountered a bug in the Drupal 6 port that's driving me nuts because it wasn't there the last time I looked. I have proof that it worked fine when I tested it on Drupal 6.9. Here is a working installation:

http://permutations.com/drup/chatbox

But something changed in Drupal after that (you know how they like to do that), and now the install routine doesn't fully work. It creates the table, but not the fields, and I can't figure out why. That means that none of the content types give you the option of associating a chatbox. I looked at the changelog for Drupal 6.34 (which is now running on the above site - it's just the install routine that fails), and the t() function was eliminated after Drupal 6.9 so I hoped that was the problem. However, removing the t() functions from phpfreechat.install did not fix it.

Can anyone help me to find this bug? I need to figure out what's wrong because it's the main sticking point in the Drupal 7 port, which is working otherwise.

Everyone please look!