I have a UITextField that is using the Museo Sans Rounded 300 font. Everything works fine for normal UITextFields, but when you set the secureTextEntry = YES, then there's this disconcerting change to the size of the bullets as the UITextField gets and loses focus (i.e. becomes, and relinquishes, being the first responder).
When the UITextField has focus, the bullets appear to be using the custom font, but once it loses focus they change to being these much bigger (standard size) bullets.