Hello,
This program crashes after 12-24 hours of running.  My OS is Ubuntu 11.10, I'm using Python 2.7.2, and gcc 4.6.1.

Here's the error:

*** glibc detected *** python: double free or corruption (!prev): 0x0000000001d53ad0 ***
======= Backtrace: =========
/lib/x86_64-linux-gnu/libc.so.6(+0x78a96)[0x7fbd28c21a96]
/lib/x86_64-linux-gnu/libc.so.6(cfree+0x6c)[0x7fbd28c25d7c]
/usr/lib/python2.7/dist-packages/psycopg2/_psycopg.so(+0xd6aa)[0x7fbd27c806aa]
/usr/lib/python2.7/dist-packages/psycopg2/_psycopg.so(+0xde51)[0x7fbd27c80e51]
/usr/lib/python2.7/dist-packages/psycopg2/_psycopg.so(+0x13f9b)[0x7fbd27c86f9b]
/usr/lib/python2.7/dist-packages/psycopg2/_psycopg.so(+0x146c6)[0x7fbd27c876c6]
python(PyEval_EvalFrameEx+0x2f9)[0x4b6569]
python(PyEval_EvalFrameEx+0xb07)[0x4b6d77]
======= Memory map: ========
00400000-00633000 r-xp 00000000 08:06 1901460                            /usr/bin/python2.7
00832000-00833000 r--p 00232000 08:06 1901460                            /usr/bin/python2.7
00833000-0089c000 rw-p 00233000 08:06 1901460                            /usr/bin/python2.7
0089c000-008ae000 rw-p 00000000 00:00 0 
01b30000-01f26000 rw-p 00000000 00:00 0                                  [heap]
7fbd1dffc000-7fbd1dffd000 ---p 00000000 00:00 0 
7fbd1dffd000-7fbd1e7fd000 rw-p 00000000 00:00 0 
7fbd1e7fd000-7fbd1e7fe000 ---p 00000000 00:00 0 
7fbd1e7fe000-7fbd1effe000 rw-p 00000000 00:00 0 
7fbd1effe000-7fbd1efff000 ---p 00000000 00:00 0 
7fbd1efff000-7fbd1f7ff000 rw-p 00000000 00:00 0 
7fbd1f7ff000-7fbd1f800000 ---p 00000000 00:00 0 
7fbd1f800000-7fbd20000000 rw-p 00000000 00:00 0 
7fbd20000000-7fbd2011e000 rw-p 00000000 00:00 0 
7fbd2011e000-7fbd24000000 ---p 00000000 00:00 0 
7fbd24411000-7fbd24426000 r-xp 00000000 08:06 1754089                    /lib/x86_64-linux-gnu/libgcc_s.so.1
7fbd24426000-7fbd24625000 ---p 00015000 08:06 1754089                    /lib/x86_64-linux-gnu/libgcc_s.so.1
7fbd24625000-7fbd24626000 r--p 00014000 08:06 1754089                    /lib/x86_64-linux-gnu/libgcc_s.so.1
7fbd24626000-7fbd24627000 rw-p 00015000 08:06 1754089                    /lib/x86_64-linux-gnu/libgcc_s.so.1
7fbd24627000-7fbd24628000 ---p 00000000 00:00 0 
7fbd24628000-7fbd24e28000 rw-p 00000000 00:00 0 
7fbd24e28000-7fbd24e34000 r-xp 00000000 08:06 1754109                    /lib/x86_64-linux-gnu/libnss_files-2.13.so
7fbd24e34000-7fbd25033000 ---p 0000c000 08:06 1754109                    /lib/x86_64-linux-gnu/libnss_files-2.13.so
7fbd25033000-7fbd25034000 r--p 0000b000 08:06 1754109                    /lib/x86_64-linux-gnu/libnss_files-2.13.so
7fbd25034000-7fbd25035000 rw-p 0000c000 08:06 1754109                    /lib/x86_64-linux-gnu/libnss_files-2.13.so
7fbd25035000-7fbd2503f000 r-xp 00000000 08:06 1754113                    /lib/x86_64-linux-gnu/libnss_nis-2.13.so
7fbd2503f000-7fbd2523f000 ---p 0000a000 08:06 1754113                    /lib/x86_64-linux-gnu/libnss_nis-2.13.so
7fbd2523f000-7fbd25240000 r--p 0000a000 08:06 1754113                    /lib/x86_64-linux-gnu/libnss_nis-2.13.so
7fbd25240000-7fbd25241000 rw-p 0000b000 08:06 1754113                    /lib/x86_64-linux-gnu/libnss_nis-2.13.so
7fbd25241000-7fbd25258000 r-xp 00000000 08:06 1754103                    /lib/x86_64-linux-gnu/libnsl-2.13.so
7fbd25258000-7fbd25457000 ---p 00017000 08:06 1754103                    /lib/x86_64-linux-gnu/libnsl-2.13.so
7fbd25457000-7fbd25458000 r--p 00016000 08:06 1754103                    /lib/x86_64-linux-gnu/libnsl-2.13.so
7fbd25458000-7fbd25459000 rw-p 00017000 08:06 1754103                    /lib/x86_64-linux-gnu/libnsl-2.13.so
7fbd25459000-7fbd2545b000 rw-p 00000000 00:00 0 
7fbd2545b000-7fbd25463000 r-xp 00000000 08:06 1754105                    /lib/x86_64-linux-gnu/libnss_compat-2.13.so
7fbd25463000-7fbd25662000 ---p 00008000 08:06 1754105                    /lib/x86_64-linux-gnu/libnss_compat-2.13.so
7fbd25662000-7fbd25663000 r--p 00007000 08:06 1754105                    /lib/x86_64-linux-gnu/libnss_compat-2.13.so
7fbd25663000-7fbd25664000 rw-p 00008000 08:06 1754105                    /lib/x86_64-linux-gnu/libnss_compat-2.13.so
7fbd25664000-7fbd2566b000 r-xp 00000000 08:06 1754132                    /lib/x86_64-linux-gnu/librt-2.13.so
7fbd2566b000-7fbd2586a000 ---p 00007000 08:06 1754132                    /lib/x86_64-linux-gnu/librt-2.13.so
7fbd2586a000-7fbd2586b000 r--p 00006000 08:06 1754132                    /lib/x86_64-linux-gnu/librt-2.13.so
7fbd2586b000-7fbd2586c000 rw-p 00007000 08:06 1754132                    /lib/x86_64-linux-gnu/librt-2.13.so
7fbd2586c000-7fbd2587a000 r-xp 00000000 08:06 1982536                    /usr/lib/python2.7/dist-packages/mx/DateTime/mxDateTime/mxDateTime.so
7fbd2587a000-7fbd25a7a000 ---p 0000e000 08:06 1982536                    /usr/lib/python2.7/dist-packages/mx/DateTime/mxDateTime/mxDateTime.so
7fbd25a7a000-7fbd25a7b000 r--p 0000e000 08:06 1982536                    /usr/lib/python2.7/dist-packages/mx/DateTime/mxDateTime/mxDateTime.so
7fbd25a7b000-7fbd25a7c000 rw-p 0000f000 08:06 1982536                    /usr/lib/python2.7/dist-packages/mx/DateTime/mxDateTime/mxDateTime.so
7fbd25a7c000-7fbd25b3d000 rw-p 00000000 00:00 0 
7fbd25b3d000-7fbd25b40000 r-xp 00000000 08:06 1754095                    /lib/x86_64-linux-gnu/libgpg-error.so.0.8.0
7fbd25b40000-7fbd25d3f000 ---p 00003000 08:06 1754095                    /lib/x86_64-linux-gnu/libgpg-error.so.0.8.0
7fbd25d3f000-7fbd25d40000 r--p 00002000 08:06 1754095                    /lib/x86_64-linux-gnu/libgpg-error.so.0.8.0
7fbd25d40000-7fbd25d41000 rw-p 00003000 08:06 1754095                    /lib/x86_64-linux-gnu/libgpg-error.so.0.8.0
7fbd25d41000-7fbd25d51000 r-xp 00000000 08:06 8518                       /usr/lib/x86_64-linux-gnu/libtasn1.so.3.1.11
7fbd25d51000-7fbd25f50000 ---p 00010000 08:06 8518                       /usr/lib/x86_64-linux-gnu/libtasn1.so.3.1.11
7fbd25f50000-7fbd25f51000 r--p 0000f000 08:06 8518                       /usr/lib/x86_64-linux-gnu/libtasn1.so.3.1.11
7fbd25f51000-7fbd25f52000 rw-p 00010000 08:06 8518                       /usr/lib/x86_64-linux-gnu/libtasn1.so.3.1.11
7fbd25f52000-7fbd25fcc000 r-xp 00000000 08:06 1754091                    /lib/x86_64-linux-gnu/libgcrypt.so.11.7.0
7fbd25fcc000-7fbd261cc000 ---p 0007a000 08:06 1754091                    /lib/x86_64-linux-gnu/libgcrypt.so.11.7.0
7fbd261cc000-7fbd261cd000 r--p 0007a000 08:06 1754091                    /lib/x86_64-linux-gnu/libgcrypt.so.11.7.0
7fbd261cd000-7fbd261d0000 rw-p 0007b000 08:06 1754091                    /lib/x86_64-linux-gnu/libgcrypt.so.11.7.0
7fbd261d0000-7fbd26271000 r-xp 00000000 08:06 8379                       /usr/lib/x86_64-linux-gnu/libgnutls.so.26.16.14
7fbd26271000-7fbd26470000 ---p 000a1000 08:06 8379                       /usr/lib/x86_64-linux-gnu/libgnutls.so.26.16.14
7fbd26470000-7fbd26477000 r--p 000a0000 08:06 8379                       /usr/lib/x86_64-linux-gnu/libgnutls.so.26.16.14
7fbd26477000-7fbd26478000 Aborted