We are experiencing this problem when scrolling up and down a table view, after we switched to Widget 2.0 and started implementing iPhone 5 support. The stack trace is short and does not include references to our code, so the problem must be internally in Corona.
Runtime error
?:0: attempt to call method ‘setFillColor’ (a nil value)
stack traceback:
[C]: in function ‘setFillColor’
?: in function ‘touch’
?: in function <?:683>
?: in function <?:218>Handling the unhandled error
See a similar posting:
http://forums.coronalabs.com/topic/33927-0-attempt-to-call-method-setfillcolor-a-nil-value/