To troubleshoot this, first reupload all the original vB non-image files (except install.php). Make sure you upload these in ASCII format and overwrite the ones on the server. Also be sure to upload the admincp files to whichever directory you have set in your config.php file. Then run 'Suspect File Versions' in Diagnostics to make sure you have all the original files for your version and that none show 'File does not contain expected contents':
Admin CP -> Maintenance -> Diagnostics -> Suspect File Versions
[Note: In some cases you may also need to remove any of the listed .xml files in the includes/xml directory.]
Next, disable all plugins.
Note: To temporarily disable the plugin system, edit config.php and add this line right under <?php
define('DISABLE_HOOKS', true);
Then if you still have this problem, create a new style and choose no parent style. This will force it to use the default templates. Finally empty your browser cache, close all browser windows then try again. Make sure you change to the new style and view your forums with it. Do you have the same problem?
I acknowledge that this is a crappy answer but it is what vB support always recommends when trouble shooting style problems.
I would do a repair/analyze on the database to see if it can clear the query problem and let your style rebuild.
Be prepared, You may have to delete your hosed style and reinstall it to get back to a running state.
HTH
