The exporting to CSV fails when the date is prior 1970

macmini2:bin intelligenx$ ./mongoexport -d bie -c test --csv -f "_id,birthdate" -o test.csv
connected to: 127.0.0.1
Tue Nov 20 13:30:06 Fatal Assertion 16227
0x100042f9b 0x10003b4f5 0x10059c962 0x10005d7d6 0x10005faa1 0x100562737 0x10005640a 0x1000563c8
0 mongoexport 0x0000000100042f9b _ZN5mongo15printStackTraceERSo + 43
1 mongoexport 0x000000010003b4f5 _ZN5mongo13fassertFailedEi + 165
2 mongoexport 0x000000010059c962 _ZN5mongo15timeToISOStringEl + 162
3 mongoexport 0x000000010005d7d6 _ZN6Export9csvStringERKN5mongo11BSONElementE + 1318
4 mongoexport 0x000000010005faa1 _ZN6Export3runEv + 3137
5 mongoexport 0x0000000100562737 _ZN5mongo4Tool4mainEiPPc + 5447
6 mongoexport 0x000000010005640a main + 58
7 mongoexport 0x00000001000563c8 start + 52
Tue Nov 20 13:30:06

***aborting after fassert() failure

In mongo 2.0.2

Tue Nov 20 13:37:37 Assertion failure strftime(buf, sizeof(buf), fmt, &t) == 20 ./client/../util/net/../../db/../util/../db/../util/concurrency/../time_support.h 61
0x577426 0x581f6b 0xaa1905 0xaa3171 0xa9c66d 0xaa02d2 0x7f978464376d 0x4fe709
mongoexport(_ZN5mongo12sayDbContextEPKc+0x96) [0x577426]
mongoexport(_ZN5mongo8assertedEPKcS1_j+0xfb) [0x581f6b]
mongoexport(_ZN6Export9csvStringERKN5mongo11BSONElementE+0xb65) [0xaa1905]
mongoexport(_ZN6Export3runEv+0xb51) [0xaa3171]
mongoexport(_ZN5mongo4Tool4mainEiPPc+0x169d) [0xa9c66d]
mongoexport(main+0x32) [0xaa02d2]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f978464376d]
mongoexport(__gxx_personality_v0+0x3d1) [0x4fe709]
assertion: 0 assertion ./client/../util/net/../../db/../util/../db/../util/concurrency/../time_support.h:61