Upgraded to Akismet 2.5. While I have the "Auto-delete spam submitted on posts more than a month old" option enabled in my Akismet options, hundreds of spam comments on old posts are visible in my spam folder.
Many are comments on posts dating back to 2006; while those comments have typically been deleted right away, they are there for my review. Over 1000 spams since 7am today.
This doesn't reflect a surge in comments that are caught; it's a surge in the comments that aren't automatically deleted.
Further, my moderation queue is suddenly active: spams are frequently being held for moderation, because contact with the Akismet server was lost. ("trying again in 10 minutes")
Finally, on a more minor note, in the Akismet stats portion of the Dashboard menu, the graph no longer appears. The numbers are there, but the images are missing. This is not a big deal, but if anyone from Automattic is reading this, it may be something else to look at. (But probably not worth a separate post...)
Any suggestions/ideas ?