[support] browser cache issues?

[Chris Johnson]

Drupal already issues, for the most part, headers and cache control
commands which should prevent browsers from wrongly caching content.
There are a few problems with how Drupal does this, but mostly in the
opposite direction:  that of preventing caching when something could
be safely cached.

Hmmm, are the users in question authenticated / logged-in users, or
are they anonymous users?