Apologies for not posting a dev question directly, but the nature of this 
problem requires OS X-experienced devs to solve. A few others online have 
experienced this problem, but no one has posted a solution.

I'm running the latest Lion on a late-model MacBook Pro with plenty of RAM and 
disk. iMovie launches fine and appears to run, but then the UI begins to break 
down. For example, if you attempt to resize the window, it shrinks a bit, and 
then major portions of the window UI disappear. The window says mostly grey, 
but lots of widgets are gone.

More importantly, Console shows stuff like what I've copied below. iMovie still 
interacts with the user, you can choose menu items, hover over where movie 
clips would be if they were drawn, and see the preview update accordingly, etc.

I tried re-installing iMovie from disk. Same behavior.

What could cause it to go out to lunch like that? Is there something more 
fundamental broken in my system? All other apps appear to behave fine.

Some of the other reports online had similar unrecognized selector errors, but 
varied widely in what the selector was.

Appreciate any help. Thanks!

-- 
Rick


5/5/12 10:03:00.077 PM iMovie: -[__NSCFNumber 
stringByTrimmingCharactersInSet:]: unrecognized selector sent to instance 
0xd4eb5f0
5/5/12 10:03:00.011 PM iMovie: (
        0   CoreFoundation                      0x9915db67 __raiseError + 231
        1   libobjc.A.dylib                     0x97162149 objc_exception_throw 
+ 155
        2   CoreFoundation                      0x99161170 -[NSObject 
doesNotRecognizeSelector:] + 256
        3   CoreFoundation                      0x990afda9 ___forwarding___ + 
457
        4   CoreFoundation                      0x990afb72 
_CF_forwarding_prep_0 + 50
        5   MCOverlay                           0x25518ff1 
-[NSDictionary(Tables) floatForKey:] + 112
        6   iMovie                              0x000f77f4 iMovie + 1009652
        7   iMovie                              0x001de71a iMovie + 1955610
        8   iMovie                              0x001dea86 iMovie + 1956486
        9   iMovie                              0x001ddd75 iMovie + 1953141
        10  iMovie                              0x001dda14 iMovie + 1952276
        11  Foundation                          0x92f5be25 
__-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_1 + 49
        12  CoreFoundation                      0x9909dcb3 
___CFXNotificationPost_block_invoke_1 + 275
        13  CoreFoundation                      0x99068a38 _CFXNotificationPost 
+ 2776
        14  Foundation                          0x92f47012 
-[NSNotificationCenter postNotificationName:object:userInfo:] + 92
        15  QTKit                               0x9aff49aa -[QTMovieMediaHelper 
postMovieNotificationName:userInfo:] + 120
        16  QTKit                               0x9aff492d -[QTMovieMediaHelper 
postMovieNotificationName:] + 48
        17  QTKit                               0x9aff128e 
MovieControllerFilterAfter + 577
        18  QuickTimeComponents                 0x9c44fbf2 _MCComponentDispatch 
+ 88435
        19  QuickTimeComponents                 0x9c44c43c _MCComponentDispatch 
+ 74173
        20  QuickTimeComponents                 0x9c43c2fb _MCComponentDispatch 
+ 8316
        21  CarbonCore                          0x987ea4fc 
callComponentStorage_424 + 33
        22  CarbonCore                          0x9889943d 
_ZL38CallComponentFunctionCommonWithStoragePPcP19ComponentParametersPFlvEm + 45
        23  CarbonCore                          0x9889947d 
CallComponentFunctionWithStorageProcInfo + 30
        24  QuickTimeComponents                 0x9c43a2bf _MCComponentDispatch 
+ 64
        25  CarbonCore                          0x9880f45d CallComponent + 223
        26  CarbonCore                          0x9880f4a6 
CallComponentDispatch + 29
        27  QuickTime                           0x938b26d0 MCDoAction + 51
        28  QuickTime                           0x938d109b 
_ZN14QTOMovieObject8GoToTimeEP10TimeRecord + 91
        29  QuickTime                           0x938b751a 
_ZN14QTOMovieObject11SetPropertyEmmPKv + 7582
        30  QuickTime                           0x938a8d02 
_Z13DispatchQTMsgPKvmmmP16QTOGenericObject + 324
        31  QuickTime                           0x938a8b1e 
_ZN17QTObjectTokenPriv19SendMessageToObjectEP13QTMessagePrivm + 188
        32  QuickTime                           0x938a850a 
_ZN17QTObjectTokenPriv15DispatchMessageEP13QTMessagePrivPKvPK13__CFAllocatormmP17ComponentMsgParammm
 + 1526
        33  QuickTime                           0x938a7ebb 
QTSendMessageToObject + 141
        34  QuickTime                           0x938b5760 QTSetObjectProperty 
+ 272
        35  QTKit                               0x9b013c25 
QTObjectTokenSetQTTime + 153
        36  QTKit                               0x9afed48e -[QTMovie_QuickTime 
setCurrentTime:] + 62
        37  QTKit                               0x9afc6441 -[QTMovie 
setCurrentTime:] + 64
        38  iMovie                              0x00060721 iMovie + 390945
        39  iMovie                              0x000576b2 iMovie + 353970
        40  iMovie                              0x000a40ab iMovie + 667819
        41  iMovie                              0x000bd2a0 iMovie + 770720
        42  iMovie                              0x000b2352 iMovie + 725842
        43  iMovie                              0x000a3f6f iMovie + 667503
        44  iMovie                              0x000bd5b3 iMovie + 771507
        45  iMovie                              0x000ac244 iMovie + 700996
        46  iMovie                              0x0010530a iMovie + 1065738
        47  Foundation                          0x92f5be25 
__-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_1 + 49
        48  CoreFoundation                      0x9909dcb3 
___CFXNotificationPost_block_invoke_1 + 275
        49  CoreFoundation                      0x99068a38 _CFXNotificationPost 
+ 2776
        50  Foundation                          0x92f47012 
-[NSNotificationCenter postNotificationName:object:userInfo:] + 92
        51  Foundation                          0x92f5c2a6 
-[NSNotificationCenter postNotificationName:object:] + 55
        52  AppKit                              0x95ecc218 -[NSTableView 
_sendSelectionChangedNotificationForRows:columns:] + 174
        53  AppKit                              0x95ea1545 -[NSTableView 
_enableSelectionPostingAndPost] + 428
        54  AppKit                              0x95ea0e1e -[NSTableView 
deselectAll:] + 185
        55  iMovie                              0x001055e2 iMovie + 1066466
        56  iMovie                              0x00101a28 iMovie + 1051176
        57  Foundation                          0x92f507c6 
__NSFireDelayedPerform + 615
        58  CoreFoundation                      0x99075656 
__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 22
        59  CoreFoundation                      0x99074fe7 __CFRunLoopDoTimer + 
743
        60  CoreFoundation                      0x99053f70 __CFRunLoopRun + 1888
        61  CoreFoundation                      0x9905347c CFRunLoopRunSpecific 
+ 332
        62  CoreFoundation                      0x99053328 CFRunLoopRunInMode + 
120
        63  HIToolbox                           0x968b617f 
RunCurrentEventLoopInMode + 318
        64  HIToolbox                           0x968bd412 
ReceiveNextEventCommon + 168
        65  HIToolbox                           0x968bd356 
BlockUntilNextEventMatchingListInMode + 88
        66  AppKit                              0x95d58a9c _DPSNextEvent + 678
        67  AppKit                              0x95d58306 -[NSApplication 
nextEventMatchingMask:untilDate:inMode:dequeue:] + 113
        68  iMovie                              0x00044e47 iMovie + 278087
        69  AppKit                              0x95d54675 -[NSApplication run] 
+ 911
        70  AppKit                              0x95fe8261 NSApplicationMain + 
1054
        71  iMovie                              0x000031b3 iMovie + 8627
        72  iMovie                              0x00002a6e iMovie + 6766
)


5/5/12 10:03:00.079 PM iMovie: Cannot update for observer <NSKeyValueObservance 
0xe0d4590> for the key path "currentProject.editInfo.themeName" from 
<ProjectController 0xdb0cd10>, most likely because the value for the key 
"currentProject" has changed without an appropriate KVO notification being 
sent. Check the KVO-compliance of the ProjectController class.
5/5/12 10:03:00.081 PM iMovie: (
        0   CoreFoundation                      0x9915db67 __raiseError + 231
        1   libobjc.A.dylib                     0x97162149 objc_exception_throw 
+ 155
        2   CoreFoundation                      0x990c5369 +[NSException 
raise:format:arguments:] + 137
        3   CoreFoundation                      0x990c52d9 +[NSException 
raise:format:] + 57
        4   Foundation                          0x92fb6cde 
-[NSKeyValueNestedProperty 
object:withObservance:didChangeValueForKeyOrKeys:recurse:forwardingValues:] + 
889
        5   Foundation                          0x92fb4ca5 NSKeyValueDidChange 
+ 407
        6   Foundation                          0x92f5c1a1 
-[NSObject(NSKeyValueObserverNotification) didChangeValueForKey:] + 131
        7   iMovie                              0x00105325 iMovie + 1065765
        8   Foundation                          0x92f5be25 
__-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_1 + 49
        9   CoreFoundation                      0x9909dcb3 
___CFXNotificationPost_block_invoke_1 + 275
        10  CoreFoundation                      0x99068a38 _CFXNotificationPost 
+ 2776
        11  Foundation                          0x92f47012 
-[NSNotificationCenter postNotificationName:object:userInfo:] + 92
        12  Foundation                          0x92f5c2a6 
-[NSNotificationCenter postNotificationName:object:] + 55
        13  AppKit                              0x95ecc218 -[NSTableView 
_sendSelectionChangedNotificationForRows:columns:] + 174
        14  AppKit                              0x95ea1545 -[NSTableView 
_enableSelectionPostingAndPost] + 428
        15  AppKit                              0x95ecb15f -[NSTableView 
_doSelectIndexes:byExtendingSelection:indexType:funnelThroughSingleIndexVersion:]
 + 3073
        16  AppKit                              0x95eca554 -[NSTableView 
selectRowIndexes:byExtendingSelection:] + 160
        17  iMovie                              0x0010186f iMovie + 1050735
        18  Foundation                          0x92f507c6 
__NSFireDelayedPerform + 615
        19  CoreFoundation                      0x99075656 
__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 22
        20  CoreFoundation                      0x99074fe7 __CFRunLoopDoTimer + 
743
        21  CoreFoundation                      0x99053f70 __CFRunLoopRun + 1888
        22  CoreFoundation                      0x9905347c CFRunLoopRunSpecific 
+ 332
        23  CoreFoundation                      0x99053328 CFRunLoopRunInMode + 
120
        24  HIToolbox                           0x968b617f 
RunCurrentEventLoopInMode + 318
        25  HIToolbox                           0x968bd4e7 
ReceiveNextEventCommon + 381
        26  HIToolbox                           0x968bd356 
BlockUntilNextEventMatchingListInMode + 88
        27  AppKit                              0x95d58a9c _DPSNextEvent + 678
        28  AppKit                              0x95d58306 -[NSApplication 
nextEventMatchingMask:untilDate:inMode:dequeue:] + 113
        29  iMovie                              0x00044e47 iMovie + 278087
        30  AppKit                              0x95d54675 -[NSApplication run] 
+ 911
        31  AppKit                              0x95fe8261 NSApplicationMain + 
1054
        32  iMovie                              0x000031b3 iMovie + 8627
        33  iMovie                              0x00002a6e iMovie + 6766
)


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