Steps to reproduce:
I can't use nautilus more than 10 minutes


Stack trace:
open("/opt/STools/gnome-2.10/share/mime/aliases", O_RDONLY|O_LARGEFILE) = 25
fstat64(25, {st_mode=S_IFREG|0664, st_size=631, ...}) = 0
) = 27
mmap2(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0fstat64(27, )                           = 0xb61b6000
{st_mode=S_IFREG|0664, st_size=631, ...}) = 0
read(25, mmap2(NULL, 32768, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0"application/msexcel application/"..., 32768) = 631
) = 0xb61a5000
read(27, read(25, "application/msexcel application/"..., 32768) = 631
"", 32768) = 0
read(27, open("/dev/tty", O_RDWR|O_NONBLOCK|O_NOCTTY"", 32768) = 0
) = -1 ENXIO (No such device or address)
futex(0xb6300010, FUTEX_WAIT, 2, NULLwritev(2, [{"*** glibc detected *** ", 23},
{"realloc(): invalid next size", 28}, {": 0x", 4}, {"b63243a8", 8}, {" ***\n",
5}], 5) = 68
rt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0
tgkill(5704, 5711, SIGABRT)             = 0
--- SIGABRT (Aborted) @ 0 (0) ---
write(3, "\33\4\2\0\0\0\0\0", 8)        = 8
write(3, " \4\2\0\0\0\0\0", 8)          = 8
write(3, "+\4\1\0", 4)                  = 4
read(3, "\1\2\354\204\0\0\0\0\33\0 \2\0\0\0\0\1\0\0\0\22\0\0\000"..., 32) = 32
futex(0xb6300010, FUTEX_WAIT, 2, NULL[{fd=17, events=POLLIN}, {fd=15,
events=POLLIN|POLLPRI}, {fd=13, events=POLLIN|POLLPRI}, {fd=14,
events=POLLIN|POLLPRI}, {fd=19, events=POLLIN|POLLPRI}, {fd=22,
events=POLLIN|POLLPRI}, {fd=21, events=POLLIN|POLLPRI}, {fd=23,
events=POLLIN|POLLPRI}, {fd=24, events=POLLIN|POLLPRI, revents=POLLIN}], 9, -1) = 1


Other information:
When I delete the aliases file, it doesn't crash anymore but each time I do an
update-mime-database (so recreating it), It hangs (only a killall -9 nautilus
can save me)