Bloqueo de Xcode al actualizar perfiles de aprovisionamiento

Parece que no puedo actualizar mis perfiles de aprovisionamiento en Xcode sin bloqueos. Cada vez que presiono el botón actualizar en organizer, se bloquea y recupero esta línea del registro de errores:

UNCAUGHT EXCEPTION (NSInvalidArgumentException): *** setObjectForKey: object cannot be nil (key: teamId)

Así que revisé mi teamId pero no encontré nada inusual. ¿Alguien tiene alguna idea de lo que causa mi problema? Esto suele funcionar para mí cada vez que actualizo mis perfiles. Incluso lo hice esta mañana como 10 veces.

EDITAR:

Aquí está el informe de bloqueo si es necesario:

Process:         Xcode [1136]
Path:            /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier:      com.apple.dt.Xcode
Version:         4.6.1 (2067)
Build Info:      IDEApplication-2067000000000000~2
App Item ID:     497799835
App External ID: 14581035
Code Type:       X86-64 (Native)
Parent Process:  launchd [272]
User ID:         501

Date/Time:       2013-03-15 15:21:43.906 +0100
OS Version:      Mac OS X 10.8.3 (12D78)
Report Version:  10

Interval Since Last Report:          14773 sec
Crashes Since Last Report:           9
Per-App Interval Since Last Report:  14523 sec
Per-App Crashes Since Last Report:   7
Anonymous UUID:                      E5C08B95-3313-ABC3-6BB7-F22E76735A98

Crashed Thread:  2  Dispatch queue: NSManagedObjectContext Queue

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000

Application Specific Information:
ProductBuildVersion: 4H512
UNCAUGHT EXCEPTION (NSInvalidArgumentException): *** setObjectForKey: object cannot be nil (key: teamId)
UserInfo: (null)
Hints: None
Backtrace:
  0  0x00007fff92639aee __exceptionPreprocess (in CoreFoundation)
  1  0x00007fff98d703f0 objc_exception_throw (in libobjc.A.dylib)
  2  0x00007fff926c85b7 -[__NSDictionaryM setObject:forKey:] (in CoreFoundation)
  3  0x0000000107d42d88 +[DTDKTeamBasedService _createRequestDictionaryForTeam:andPlatform:] (in DTDeviceKit)
  4  0x0000000107d45315 +[DTDKDownloadProvisioningProfileService serviceForTeam:andPlatform:andProfileID:withError:] (in DTDeviceKit)
  5  0x0000000107d6e1c0 +[DTDKDownloadProvisioningProfileService serviceForProvisioningProfileRecord:withError:] (in DTDeviceKit)
  6  0x0000000107d73728 __72+[DTDKPortalDatabase _refreshFromProvisioningProfileListServices:error:]_block_invoke (in DTDeviceKit)
  7  0x00007fff9429d4dc developerSubmittedBlockToNSManagedObjectContextPerform (in CoreData)
  8  0x00007fff9429d40a -[NSManagedObjectContext performBlockAndWait:] (in CoreData)
  9  0x0000000107d73246 +[DTDKPortalDatabase _refreshFromProvisioningProfileListServices:error:] (in DTDeviceKit)
 10  0x0000000107d75816 __56+[DTDKPortalDatabase refresh:parentWindow:withCallback:]_block_invoke_5 (in DTDeviceKit)
 11  0x00007fff942cd7cf developerSubmittedBlockToNSManagedObjectContextPerform_privateasync (in CoreData)
 12  0x00007fff90dd20b6 _dispatch_client_callout (in libdispatch.dylib)
 13  0x00007fff90dd347f _dispatch_queue_drain (in libdispatch.dylib)
 14  0x00007fff90dd32f1 _dispatch_queue_invoke (in libdispatch.dylib)
 15  0x00007fff90dd31c3 _dispatch_worker_thread2 (in libdispatch.dylib)
 16  0x00007fff964d4d0b _pthread_wqthread (in libsystem_c.dylib)
 17  0x00007fff964bf1d1 start_wqthread (in libsystem_c.dylib)

objc[1136]: garbage collection is ON
abort() called
.....
[The report itself is very large and contains much more than this]