I got a strange latency when loading pages in FF4. Not sure if WebRep is responsible. Pages actually don't take more time to load as it usually happens when it lags, it's the loading that just stops one second in the middle of the process before resuming.
edit: no it's not webrep, I just disabled it and restarted FF4, no change... no idea where that comes from it just started after a new AIS install, and I haven't modified any default setting yet.