SIGABRT on FCModel dealloc

[rustyshelf]

This one seems to be fairly consistent in terms of crashing:
Exception Type: SIGABRT
Exception Codes: #0 at 0x3b9281f0
Crashed Thread: 0

Thread 0 Crashed:
0   libsystem_kernel.dylib               0x3b9281f0 __pthread_kill + 8
1   libsystem_pthread.dylib              0x3b992797 pthread_kill + 56
2   libsystem_c.dylib                    0x3b8d8fdd abort + 74
3   libsystem_malloc.dylib               0x3b950d67 free + 380
4   libobjc.A.dylib                      0x3b36c3ad object_dispose + 18
5   podcasts                             0x0016d639 -[FCModel dealloc] (FCModel.m:778)
6   libobjc.A.dylib                      0x3b374b6b objc_object::sidetable_release(bool) + 172
7   CoreFoundation                       0x30b4b93d CFRelease + 554
8   CoreFoundation                       0x30b666e3 -[__NSSetI dealloc] + 124
9   libobjc.A.dylib                      0x3b374b6b objc_object::sidetable_release(bool) + 172
10  libobjc.A.dylib                      0x3b3750d7 (anonymous namespace)::AutoreleasePoolPage::pop(void*) + 356
11  CoreFoundation                       0x30b4ec69 _CFAutoreleasePoolPop + 14
12  CoreFoundation                       0x30be41cb __CFRunLoopRun + 1304
13  CoreFoundation                       0x30b4ef0f CFRunLoopRunSpecific + 520
14  CoreFoundation                       0x30b4ecf3 CFRunLoopRunInMode + 104
15  GraphicsServices                     0x35a70663 GSEventRunModal + 136
16  UIKit                                0x3349a16d UIApplicationMain + 1134
17  podcasts                             0x00049ee7 main (main.m:14)
18  libdyld.dylib                        0x3b872ab7 start + 0

Any ideas what this could be? Seems like an FCModel object is in a set, the set gets released then it crashes. Latest version as at 2 July 2014.