user warnings during upgrade

I did a upgrade from Drupal 4.73 to the Beta version on a test site that had about 1400 nodes of content and a dozen or so modules.

I receive about 6 'user warnings' just before I do the DB update that warn me that certain tables don't exist. They don't exsist in the 4.73 version but are needed for the Beta. After I run the update the missing tables are inserted and one final warning is displayed (see below). I'll reply to this if I find a problem with the operation of the site.

user warning: Table 'dbname.node_type' doesn't exist query: SELECT nt.type, nt.* FROM node_type nt ORDER BY nt.type ASC in /home/user/public_html/drupaltest/includes/database.mysql.inc on line 167.