HcD wrote:
Well, it's databound to a textbox ..
But are you or aren't you setting the value? By default a NULL in teh db or a new value gets the default value defined in TypeDefaultValues.cs. This means for a float, it's 0.0f.
It's wise to define a default constraint in the DB for the field, in this case. By default the fields in a new entity aren't marked as changed when no value is set for that field.