My new oven has a convection setting.  In the convection mode, the oven temperature is lowered and the oven recirculates the air inside with a fan.  With this feature, you can bake cookies on all three racks and they all turn out the same.   So, it seemed like a natural for all sorts of baking.

But, as it turns out, convection bake does not work well with muffins.  While the muffins all turn our uniformly the same, they all lean.  This is presumably because the convection fan blows hot air over the rising muffins pushing them to one side.  The muffins are still good even though they are lopsided.