Snap no longer works when moving/copying entitiies

When I try to move (drawing) entities, the snapping yellowball highlights the snap points (as it always has) but when I dropit to an exact snap point, say, for instance the end of a line, itfails to drop on that snap point. In others words: Ican't ever move entitiesexactly where I want them. Is this a bug?

This has only been a problem in SW09, SW08 it functionedproperly.SolidworksSketching