The fields FORUM_ALLOW_HTML and FORUM_ALLOW_MARKUP for the FORUMS table are missing for the createtable.php script released with 7.3.

That's normal. These fields are no longer stored in the ubbt_FORUMS table and are now a FORUM_PERMISSION setting so they can be applied on a per group basis.

Normal...

But in threads_import you have

$query = "insert into {$config['TABLE_PREFIX']}FORUMS
(FORUM_TITLE,FORUM_DESCRIPTION,FORUM_ALLOW_HTML,
FORUM_ALLOW_MARKUP,FORUM_CREATED_ON,FORUM_IS_MODERATED,
CATEGORY_ID,FORUM_TOPICS,FORUM_POSTS,FORUM_SORT_ORDER,
FORUM_DEFAULT_TOPIC_AGE,FORUM_IS_ACTIVE)
values
( ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? , ? )
";

Perhaps I'm using the wrong threads_import.

I don't think the importers have been updated for 7.3 yet.

Obviously you must be correct.

It might be helpful if there was a version number for the threads_import script somewhere (on the members page, in the source file, etc.) Perhaps I missed it somewhere.

The importers should have been updated at the same time 7.3 was put into the Members Area. Will need to double check.

The changes required appear non-trivial. I'll have to postpone my upgrade.

Thank you for today's update to the threads_import script. The forums and posts now import.

I've now made it down to the Moderator Permissions. The createtable script doesn't seen to build this table.

Need to make one more change to that. It's not that it isn't building the table, it's that the table insert is no longer needed.

Once you get to the moderator's part and it stops or errors, you can just change ubb=mods to ubb=buddies and it will continue fine.