I came across a recipe for winter food that was 1 cup of corn syrup to 7.5 cups of powdered sugar. Seemed to work pretty well. Was 60 degrees today so I did a quick inspection and found lots of trouble. The corn syrup had leaked out and caused a big mess and lots of bee death. I suppose it was the heat from inside the hive. Hive has survived but has lost probably 1000 bees.
The full story and picture is here: http://www.johncall.com/blog/inspection-010409/