We have mentioned before that both Pressflow 6.x and Drupal 7.x (but not core Drupal 6.x), disable page caching when a session is created for an anonymous user.
An extreme case of this happened recently, because of a perfect storm.
Just going to DrupalCon to watch is awe inspiring. The amount of people there, all sharing one common goal: to learn more and grow the power of Drupal, thereby empowering themselves...
Just going to DrupalCon to watch is awe inspiring. The amount of people there, all sharing one common goal: to learn more and grow the power of Drupal, thereby empowering themselves...