I just tried it again under gdb on MacOS 10.6, the supplied python 2.6.4 and got this backtrace:

Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to process 61133]
0x00007fff87a4b790 in __CFInitialize ()
(gdb) bt
#0  0x00007fff87a4b790 in __CFInitialize ()
#1  0x00007fff5fc0d5ce in __dyld__ZN16ImageLoaderMachO11doImageInitERKN11ImageLoader11LinkContextE ()
#2  0x00007fff5fc0d607 in __dyld__ZN16ImageLoaderMachO16doInitializationERKN11ImageLoader11LinkContextE ()
#3  0x00007fff5fc0bcec in __dyld__ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEj ()
#4  0x00007fff5fc0bc9d in __dyld__ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEj ()
#5  0x00007fff5fc0bc9d in __dyld__ZN11ImageLoader23recursiveInitializationERKNS_11LinkContextEj ()
#6  0x00007fff5fc0bda6 in __dyld__ZN11ImageLoader15runInitializersERKNS_11LinkContextE ()
#7  0x00007fff5fc08fbb in __dyld_dlopen ()
#8  0x00007fff8276fe00 in dlopen ()
#9  0x00000001000e876f in _PyImport_GetDynLoadFunc ()
#10 0x00000001000d2ce4 in _PyImport_LoadDynamicModule ()
#11 0x00000001000d0fbf in import_submodule ()
#12 0x00000001000d14da in load_next ()
#13 0x00000001000d17ec in PyImport_ImportModuleLevel ()
#14 0x00000001000aeeb3 in builtin___import__ ()
#15 0x000000010000c092 in PyObject_Call ()
#16 0x00000001000b00e7 in PyEval_CallObjectWithKeywords ()
#17 0x00000001000b43ae in PyEval_EvalFrameEx ()
#18 0x00000001000b8fd0 in PyEval_EvalCodeEx ()
#19 0x00000001000b90b6 in PyEval_EvalCode ()
#20 0x00000001000cdeb0 in PyImport_ExecCodeModuleEx ()
#21 0x00000001000cf112 in load_source_module ()
#22 0x00000001000d0fbf in import_submodule ()
#23 0x00000001000d14da in load_next ()
#24 0x00000001000d17ec in PyImport_ImportModuleLevel ()
#25 0x00000001000aeeb3 in builtin___import__ ()
#26 0x000000010000c092 in PyObject_Call ()
#27 0x00000001000b00e7 in PyEval_CallObjectWithKeywords ()
#28 0x00000001000b43ae in PyEval_EvalFrameEx ()
#29 0x00000001000b8fd0 in PyEval_EvalCodeEx ()
#30 0x00000001000b90b6 in PyEval_EvalCode ()
#31 0x00000001000cdeb0 in PyImport_ExecCodeModuleEx ()
#32 0x00000001000cf112 in load_source_module ()
#33 0x00000001000d0fbf in import_submodule ()
#34 0x00000001000d14da in load_next ()
#35 0x00000001000d17ec in PyImport_ImportModuleLevel ()
#36 0x00000001000aeeb3 in builtin___import__ ()
#37 0x000000010000c092 in PyObject_Call ()
#38 0x000000010000fbe5 in PyObject_CallFunction ()
#39 0x00000001000d1f9b in PyImport_Import ()
#40 0x00000001000d250f in PyImport_ImportModuleNoBlock ()
#41 0x0000000100515733 in time_strptime ()
#42 0x00000001000b8278 in PyEval_EvalFrameEx ()
#43 0x00000001000b8fd0 in PyEval_EvalCodeEx ()
#44 0x000000010003b355 in function_call ()
#45 0x000000010000c092 in PyObject_Call ()
#46 0x00000001000b00e7 in PyEval_CallObjectWithKeywords ()
#47 0x00000001000ef7ae in t_bootstrap ()
#48 0x00007fff827a2f8e in _pthread_start ()
#49 0x00007fff827a2e41 in thread_start ()
(gdb)