IPhoto 9.4.2 quitting on launch

Question

Hello all - wondering if you might be able to help? I have spent 2 hours searching here and elsewhere for a solution.
iPhoto is quitting on startup - excerpt from the Crash Report is below. So far I have ...
1. Repaired Disk Permissions several times.
2. Made sure ownership of preferences folder (and files) are set to me.
3. Rebooted into Safe Mode.
4. Deleted .GlobalPreferences.plist and rebooted.
5. Enabled Root User in Directory Utility.
None of the above has made any difference.
If I log in as another user, however, iPhoto will open which makes me think this is a permissions problem but I'm really not sure. Any thoughts appreciated.
Thank you!
Process:         iPhoto [418]
Path:            /Applications/iPhoto.app/Contents/MacOS/iPhoto
Identifier:      com.apple.iPhoto
Version:         9.4.2 (9.4.2)
Build Info:      iPhotoProject-710042000000000~1
Code Type:       X86 (Native)
Parent Process:  launchd [133]
Date/Time:       2012-11-30 11:26:04.975 +0000
OS Version:      Mac OS X 10.7.5 (11G63)
Report Version:  9
Interval Since Last Report:          46252 sec
Crashes Since Last Report:           28
Per-App Crashes Since Last Report:   28
Anonymous UUID:                      BEC5060A-11E2-47B2-9707-4AC3A70153A1
Crashed Thread:  0  Dispatch queue: com.apple.main-thread
Exception Type:  EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Application Specific Information:
dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
xpchelper reply message validation: sandbox creation failed: 1002
Container object initialization failed: The file “.GlobalPreferences.plist” couldn’t be saved in the folder “Preferences” because a file with the same name already exists.
Application Specific Signatures:
sandbox creation failed: 1002
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libxpc.dylib                            0x9733a54e runtime_init + 2014
1   libdispatch.dylib                       0x92bfcc27 dispatch_once_f + 50
2   libxpc.dylib                            0x9733ad92 _xpc_runtime_set_domain + 350
3   libxpc.dylib                            0x973379af _libxpc_initializer + 578
4   libSystem.B.dylib                       0x935f77a7 libSystem_initializer + 199
5   dyld                                    0x8fe3a203 ImageLoaderMachO::doModInitFunctions(ImageLoader::LinkContext const&) + 251
6   dyld                                    0x8fe39d68 ImageLoaderMachO::doInitialization(ImageLoader::LinkContext const&) + 64
7   dyld                                    0x8fe372c8 ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&) + 256
8   dyld                                    0x8fe3725e ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&) + 150
9   dyld                                    0x8fe3725e ImageLoader::recursiveInitialization(ImageLoader::LinkContext const&, unsigned int, ImageLoader::InitializerTimingList&) + 150
10  dyld                                    0x8fe38268 ImageLoader::runInitializers(ImageLoader::LinkContext const&, ImageLoader::InitializerTimingList&) + 62
11  dyld                                    0x8fe2c694 dyld::initializeMainExecutable() + 214
12  dyld                                    0x8fe30f99 dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**) + 2238
13  dyld                                    0x8fe2a2ef dyldbootstrap::start(macho_header const*, int, char const**, long, macho_header const*) + 637
14  dyld                                    0x8fe2a063 _dyld_start + 51
Thread 0 crashed with X86 Thread State (32-bit):
  eax: 0x000000f7  ebx: 0x79e66b70  ecx: 0xc0026157  edx: 0x00000000
  edi: 0xc0026060  esi: 0xac831410  ebp: 0xc0027098  esp: 0xc00257a0
   ss: 0x0000001f  efl: 0x00010282  eip: 0x9733a54e   cs: 0x00000017
   ds: 0x0000001f   es: 0x0000001f   fs: 0x00000000   gs: 0x00000037
  cr2: 0x0e7ae02c
Logical CPU: 0

Answer 1

After a lot of searching, tweaks and hair pulling, I discovered that every single preferences file inside user/Library/Containers/com.apple.iPhoto/ had somehow become unwriteable by "me" despite having ensured permissions were correct on all of them. I even reset ACLs and permissions in the Reset Password application that lies within Terminal available via a CMD R reboot into Recovery mode.
The solution was to pretty much delete all of the files until iPhoto was happy to launch. I had to use Terminal to unhide files including the .GlobalPreferences.plist file that resides within this folder.
Interestingly, on another machine that is still on 10.7.4 and iPhoto 9.3.1 the com.apple.iPhoto folder doesn't exist within Containers so the explanation may lie within the 10.7.5 / iPhoto 9.4.2 updates. All of the files that iPhoto was having problems with were aliases that were created at the same time as the updates. After deleting them, iPhoto recreated them in a slightly different way and is now happy with them.
I'm leaving this up in case anyone else comes across the problem of iPhoto not opening and reporting a crash error of files not being able to be saved due to them already existing in the target destination (...couldn't save the file x in Folder y because it already exists).