System.NullReferenceException: Object reference not set to an instance of an 
object
at 
KleverLogic.FlashValet.iPhone.Valet.UpdatePhoneViewController.HandleUpdatePhoneButtonClicked
 (System.Object sender, System.EventArgs e) [0x00015] in 
/xsl-home/kleverlogic/FlashValet/Mobile/iPhone/Valet/UpdatePhoneViewController.cs:86

Seems simple enough... but.

this.NavigationController.NavigationBarHidden = true;

This code has been working for 2 or 3 months, and just now got a dozen or so 
errors like above - how could this be possible? It's a view used once on login, 
it is pretty basic (one label, one text field, one button) and has worked 
flawlessly for months. Still works perfectly on my phone, but clearly one of my 
clients is having problems because the NavigationController is null - but how 
can it be?

Dino
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