When I upgraded my drupal installation from 4.6.5 to 4.7.4, The upgrade script seemed to run just fine. (There were no errors on the upgrade page, and it said all was well.) However, when I clicked on the links that point to my home page, to my administration page, and to the log, all pages showed errors. By the way, before I ran the update script, when it showed me a system module version to select, it had preselected number 129, so I just left it at that when I ran the update script.
Besides not seeing any of my regular home page content, this error appeared multiple times on the home page:
user warning: Table 'drupal.node_revisions' doesn't exist query: SELECT n.nid, n.vid, n.type, n.status, n.created, n.changed, n.comment, n.promote, n.moderate, n.sticky, r.timestamp AS revision_timestamp, r.title, r.body, r.teaser, r.log, r.format, u.uid, u.name, u.picture, u.data FROM node n INNER JOIN users u ON u.uid = n.uid INNER JOIN node_revisions r ON r.vid = n.vid WHERE n.nid = 1102 in C:\apache\htdocs\drupal\includes\database.mysqli.inc on line 122.
After the multiple instances of this error, there are a bunch of lines that say "by Anonymousn/a".
In the log are a ton of messages that look like these:
user warning: Unknown column 'theme' in 'where clause' query: SELECT * FROM blocks WHERE theme = 'bluemarine' AND status = 1 ORDER BY region, weight, module in C:\apache\htdocs\drupal\includes\database.mysqli.inc on line 122.