Nothing different in the logs and timers.. Hmm, maybe its when you post, the delay in it completing? If so, that may be the 35,000 posts.. when it hits around 40,000 it does slow down a tiny bit, and I usually archive posts to trim it to 25,000 or so.
Let me know exactly where its slower..
PS: AT&T is having backbone issues, so maybe that is it? Check your trace route to
www.ironworksforum.com and see.