I think this is a mistake. Give Lehtonen the day off on Thursday against Tampa Bay. The Thrashers have already had two full days to rest. Lehtonen should have played in the two Carolina games this week (well....unless he got shelled in the first one) and start Moose in between.
I'd expect him to start again Sat vs CAR, unless he totally screws the pooch tonight. While he wasn't stellar Tuesday, he was good and I think having him in nets made the boys more concious of taking care of business in their own end.