Pretty nice addon, but unfortunately it can freeze your screen for a few seconds whenever you click on your player-icon or drop shaman totems.
Finding someone to fix it would be nice of course. I updated all Ace-libs with the latest versions from 2010, but unfortunately that doesn't do the job.
You most likely have an addon that gets triggered when placing totems and it in turn lags the game. Start by disabling all addons and testing without them(with/without UF addon).
I did all of the usual stuff that any helpdesk would suggest, including checking if my computer is switched on. Unfortunately this issue of microfreezing when you click on certain UI elements or drop totems which creates UI elements is not going away. The workaround is to click on the player-picture and to drop totems once after login. After doing that it works flawlessly. So in an essence I was able to track it down. It only happens once every new session as if the system is initialising.