Pages don't show new content unless hard refresh

[hst]

I'm not sure if this is a problem with VB or vbSEO:

When someone posts to my forum it often doesn't show up until you do a hard refresh with Ctrl-F5. Sometimes after people login they get redirected back to a page that looks like they aren't logged in.

I had no-cache headers on but the traffic got high enough that the no-cache headers cause too much server load and the site crashes.

Any ideas?

[Jake Bunce]

The no-cache header option is what I usually recommend when you are having caching issues like this. I am not aware of vBSEO causing this problem but it wouldn't hurt to ask on their site.

Otherwise you can adjust the caching options in your browser.

[hst]

Drupal and vBulletin problem

The no-cache header option is what I usually recommend when you are having caching issues like this. I am not aware of vBSEO causing this problem but it wouldn't hurt to ask on their site.

Otherwise you can adjust the caching options in your browser.

The no-cache header was putting too much load on the server.

It turns out the problem was that I was running Drupal in the main site (domain root) and vBulletin in a subdirectory (/forum). Drupal has the following lines in .htaccess:

# Requires mod_expires to be enabled.
<IfModule mod_expires.c>
  # Enable expirations.
  ExpiresActive On
  # Cache all files for 2 weeks after access (A).
  ExpiresDefault A1209600
  # Do not cache dynamically generated pages.
  ExpiresByType text/html A1
</IfModule>

I added this line to the vBulletin .htaccess file:

# stop caching problems:
ExpiresActive Off

...and that fixed it.

Hope that info can help other people who are running Drupal and vBulletin together...