Hey Mike,
You might also want to check out your htaccess file since W3TC doesn’t erase that data when it’s uninstalled or deleted.
Mainly this should be in your htaccess file without W3 Total Cache.
# 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
My server and site has been down since 6:00 last night so I understand everyone’s frustration.
Interestingly my hosting (InMotion) had recommended W3 TC, but after all this mess, they’ve let me know that they’re going to be recommending WP Super Cache since they’ve had a huge amount of sites going down in the past 24 hours with the upgrade.
The plugin works great when it’s set perfectly, but it can be a real bear when one thing is off. The fact that it can take down a beefy dedicated server like mine makes me very nervous with it too. My hosting is amazing at fixing any issue, but this one has had them stumped.