I wondered the same thing so I thought I'd try it out and at least for me it kicks me out. The new odyssey and detour bars are awesome but they kicked me out on two ocassions in the last week and I only tried 1 bar each day.
So then sugar alcohols will definately kick you out of ketosis right? The new Odyssey bar tastes damn good but has something like 23g of sugar alcohols. Oh well........