Sorry to trouble this list yet again, but the main screen (in fact the the 
first card) in my mobile app has a “settings” graphic which acts as a button 
which to take the user to a ‘menu’ card. That card contains buttons and 
graphics which lead on (via very simple MouseUp handlers) to specialised menu 
actions, each on its own card. One can return to the main screen from each of 
these action cards.

When I run my app in the iPhone simulator, the activities on the main screen 
all work, with buttons, fields etc. When I click on the ‘go to menu card’ 
graphic, that always works. But when I get there, sometimes some of the menu 
buttons work, but sometimes the whole card becomes unresponsive, so that none 
of the buttons work, not even a ‘cancel’ button whose job is just to go back to 
the main screen. This didn’t used to happen, so I have messed up somehow. But 
my question is, what sort of action would make an entire card unresponsive? 
Maybe the app is stuck doing something I can’t see, but what could it be?

Any ideas welcome, including a debugging strategy.

Graham
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