I have a wordpress.org blog that I host on my own site. I have the Akismet plugin installed, and in general I keep both up-to-date (e.g. at the moment, Akismet is at version 2.5.7, and Wordpress at 3.5.1).
From time-to-time (maybe every week or so), I get a notification email from Wordpress that a (generally spam) comment needs moderating. When I log in to moderate it, Wordpress informs me that it has already been marked as spam (although I haven't marked it so, but I assume Wordpress means that Akismet has determined that). In this case, why do I get the notification email in the first place? Is Akismet failing to connect to the Akismet service, notifying me, and retrying later? If so, is it possible to turn off the initial notification email in this case? It's irritating to log in to moderate something only to discover Wordpress already knows the answer!