Ah, well, dreamhost fixed my bug for me (YAY dreamhost!!), but just to alleviate the suspense I’m sure everyone is feeling over it, here is what my problem was: the site made use of Permalinks, and in its new location we did not have an .htaccess file, which needed to exist and have the following code in it:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
Now ya know! 🙂