dev-branch upgrade calendar issue

I keep one of my servers on the latest Kolab dev repo and usually update 
it every week. I just ran the update for this week and have notice huge 
slow downs when looking at a calendar in Roundcube. Most of the time it 
will sit there "Loading" while one of the server CPUs shoots up to 100%, 
after a minute or so the calendar loads. Anyone else seeing this?

-- 
Mat