I have a Cocoa app that has an NSWindowController controlling an NSWindow with an NSComboBox in it. Nothing special, and it worked fine until upgrading to OS X 10.7.2. Now I get the following exception, which occurs only once, when the window controller's window loads. (Since the window controller in my app remains loaded, it happens only once per app launch.) Subsequently focusing and unfocusing the combo box does not trigger it.
Anyone know whether something changed in 10.7.2, and if so how to work around it?
(This is happening with Xcode 4.2.)
2011-10-24 11:30:21.649 MyApp[7934:707] Unlocking Focus on wrong view ((null)), expected <NSComboBox: 0x40083d6e0>
2011-10-24 11:30:21.653 MyApp[7934:707] (
0 CoreFoundation 0x00007fff8412d286 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff88cdad5e objc_exception_throw + 43
2 CoreFoundation 0x00007fff8412d0ba +[NSException raise:format:arguments:] + 106
3 CoreFoundation 0x00007fff8412d044 +[NSException raise:format:] + 116
4 AppKit 0x00007fff8c76c1d5 -[NSFocusStack unfocusView:] + 194
5 AppKit 0x00007fff8c7e838e +[_NSAutomaticFocusRing showForView:] + 2545
6 AppKit 0x00007fff8cdbb4d1 __postActiveFirstResponderChanged_block_invoke_1 + 32
7 CoreFoundation 0x00007fff840ecf37 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
8 CoreFoundation 0x00007fff840ece96 __CFRunLoopDoObservers + 374
9 CoreFoundation 0x00007fff840c2159 __CFRunLoopRun + 825
10 CoreFoundation 0x00007fff840c1ae6 CFRunLoopRunSpecific + 230
11 HIToolbox 0x00007fff8c0d73d3 RunCurrentEventLoopInMode + 277
12 HIToolbox 0x00007fff8c0de58f ReceiveNextEventCommon + 181
13 HIToolbox 0x00007fff8c0de4ca BlockUntilNextEventMatchingListInMode + 62
14 AppKit 0x00007fff8c71e3f1 _DPSNextEvent + 659
15 AppKit 0x00007fff8c71dcf5 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 135
16 AppKit 0x00007fff8c71a62d -[NSApplication run] + 470
17 AppKit 0x00007fff8c99980c NSApplicationMain + 867
18 MyApp 0x0000000100001682 main + 34
19 MyApp 0x0000000100001654 start + 52
)