I just posted in the Reaching 100 pages section on the 75 page shout out thread and when I hit preview I got the following error:

user warning: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'IN ('308')) ) ORDER BY node_created_created DESC LIMIT 0, 1' at line 1 query: SELECT node.nid, node.created AS node_created_created FROM node node LEFT JOIN i18n_node i18n ON node.nid = i18n.nid WHERE (i18n.language ='eng' OR i18n.language ='' OR i18n.language IS NULL) AND ( (node.status = '1') AND (node.type IN ('page','story')) AND (.tid IN ('308')) ) ORDER BY node_created_created DESC LIMIT 0, 1 in /var/www/drupal-OLL-SF-2009/includes/database.mysql.inc on line 164.

When I hit the post comment button, the post updated to the thread, but I still saw the above error after words.

That last line should read:

When I hit the post comment button, the post updated to the thread, but I still saw the above error afterwards.

I'm also running XPSP2 with IE6 if that helps.

Hmm. Is this still happening?

I only saw it the once.

Well, if it keeps happening, I'll put in a bug report, but it seems likely that the tech team was fooling with the database, and you might have caught them at a strange moment.