I know this looks not related but perhaps worth your attention, especially in case d.o. uses APC (I wouldn't know). http://drupal.org/node/196810 Basically, behaviour same as described by Dave but noticed at editing nodes, also without Drupal's confirmation msg. Tomas David Cohen wrote:
In case it helps, when this happens I never see the confirmation message which comes from drupal_set_message(). Which indicates something is happening to $_SESSION data. Usually, when a drupal_set_message() is not seen right away, it will appear eventually (next time a page is viewed with that session still active).
-Dave
On Wed, 5 Dec 2007 19:40:50 -0800, "Narayan Newton" <nnewton@osuosl.org> said:
I'll be looking at this, but I really doubt its replication delay at this point...