iOS Keyboard Input Positioning Wrong

Hey everyone! I'm using NGUI in my app, and I don't know if this is an NGUI issue or a Unity issue or what. Check out this screenshot:

You see what happens when you pull up a keyboard? The preview input is 40 pixels higher than it should be. You can see my password field between the keyboard and input area, both of which are native iOS widgets. Anyone have any idea about what could be causing this, or how I can get the preview input to go down to where it should be?

Thanks!