apt-get/aptitude crash

Binary package hint: apt

from one day to another while trying to update, apt-get crashes (as root, same with sudo):

...
open("/var/cache/apt/pkgcache.bin", O_RDWR|O_CREAT|O_TRUNC, 0666) = 7
fcntl64(7, F_SETFD, FD_CLOEXEC) = 0
fchmod(7, 0644) = 0
fstat64(7, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
lseek(7, 16777215, SEEK_SET) = 16777215
write(7, "\0", 1) = 1
fstat64(7, {st_mode=S_IFREG|0644, st_size=16777216, ...}) = 0
mmap2(NULL, 16777216, PROT_READ|PROT_WRITE, MAP_SHARED, 7, 0) = 0xb6b8e000
stat64("/var/cache/apt/srcpkgcache.bin", {st_mode=S_IFREG|0644, st_size=9153875, ...}) = 0
open("/var/cache/apt/srcpkgcache.bin", O_RDONLY) = 8
fcntl64(8, F_SETFD, FD_CLOEXEC) = 0
fstat64(8, {st_mode=S_IFREG|0644, st_size=9153875, ...}) = 0
mmap2(NULL, 9153875, PROT_READ, MAP_SHARED, 8, 0) = 0xb62d3000
stat64("/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_edgy_main_binary-i386_Packages", {st_mode=S_IFREG|0644, st_size=4821346, ...}) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Process 29184 detached

same with aptitude

rename("/root/.aptitude/config.new", "/root/.aptitude/config") = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
access("/root/.terminfo/x/xterm", R_OK) = -1 ENOENT (No such file or directory)
access("/etc/terminfo/x/xterm", R_OK) = -1 ENOENT (No such file or directory)
access("/lib/terminfo/x/xterm", R_OK) = 0
open("/lib/terminfo/x/xterm", O_RDONLY|O_LARGEFILE) = 3
read(3, "\32\1\34\0\35\0\17\0\235\1&\5", 12) = 12
read(3, "xterm|X11 terminal emulator\0", 28) = 28
read(3, "\0\1\0\0\1\0\0\0\1\0\0\0\0\1\1\0\0\0\0\0\0\0\1\0\0\1\0"..., 29) = 29
read(3, "\0", 1) = 1
read(3, "P\0\10\0\30\0\377\377\377\377\377\377\377\377\377\377\377"..., 30) = 30
read(3, "\0\0\4\0\6\0\10\0\31\0\36\0&\0*\0.\0\377\3779\0J\0L\0P"..., 826) = 826
read(3, "\33[Z\0\7\0\r\0\33[%i%p1%d;%p2%dr\0\33[3g\0\33["..., 1318) = 1318
read(3, "", 10) = 0
close(3) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TIOCGWINSZ, {ws_row=53, ws_col=158, ws_xpixel=0, ws_ypixel=0}) = 0
brk(0x82ff000) = 0x82ff000
brk(0x8320000) = 0x8320000
brk(0x8341000) = 0x8341000
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
brk(0x8362000) = 0x8362000
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig -icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig -icanon -echo ...}) = 0
                                                                               ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
   rt_sigaction(SIGTSTP, NULL, {SIG_DFL}, 8) = 0
                                                rt_sigaction(SIGTSTP, {0xb7e0ddfe, [], SA_RESTART}, NULL, 8) = 0
                                                                                                                rt_sigaction(SIGINT, NULL, {SIG_DFL}, 8) = 0
                                                                                                                                                            rt_sigaction(SIGINT, {0xb7e0dd0b, [], SA_RESTART}, NULL, 8) = 0
                                                             rt_sigaction(SIGTERM, NULL, {SIG_DFL}, 8) = 0
                                                                          rt_sigaction(SIGTERM, {0xb7e0dd0b, [], SA_RESTART}, NULL, 8) = 0
            rt_sigaction(SIGWINCH, NULL, {SIG_DFL}, 8) = 0
                                                          rt_sigaction(SIGWINCH, {0xb7e0dce7, [], 0}, NULL, 8) = 0
                                                                                                                  ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
                                      ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
                                                                                                                        ioctl(1, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig -icanon -echo ...}) = 0
                                         ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
                                                                                                                           ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
                                               ioctl(1, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig -icanon -echo ...}) = 0
                                                                                                                              ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
) = 16 write(1, "\33[?1049h\33[1;53r\33[m\33(B\33[4l\33[?7h\33["..., 37
      ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig -icanon -echo ...}) = 0
                                                                                        ioctl(1, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
write(2, "Aua! SIGSEGV erhalten, sterbe.."..., 34Aua! SIGSEGV erhalten, sterbe...
) = 34
rt_sigaction(SIGSEGV, {SIG_DFL}, {0x8170430, [SEGV], SA_RESTART}, 8) = 0
tgkill(29235, 29235, SIGSEGV) = 0
sigreturn() = ? (mask now [WINCH])
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Process 29235 detached

with synaptic
...
stat64("/var/cache/apt/pkgcache.bin", {st_mode=S_IFREG|0644, st_size=16777216, ...}) = 0
open("/var/cache/apt/pkgcache.bin", O_RDONLY) = 9
fcntl64(9, F_SETFD, FD_CLOEXEC) = 0
fstat64(9, {st_mode=S_IFREG|0644, st_size=16777216, ...}) = 0
mmap2(NULL, 16777216, PROT_READ, MAP_SHARED, 9, 0) = 0xb5627000
munmap(0xb5627000, 16777216) = 0
close(9) = 0
unlink("/var/cache/apt/pkgcache.bin") = 0
lstat64("/var/cache/apt/pkgcache.bin", 0xbfd52150) = -1 ENOENT (No such file or directory)
open("/var/cache/apt/pkgcache.bin", O_RDWR|O_CREAT|O_TRUNC, 0666) = 9
fcntl64(9, F_SETFD, FD_CLOEXEC) = 0
fchmod(9, 0644) = 0
fstat64(9, {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
lseek(9, 16777215, SEEK_SET) = 16777215
write(9, "\0", 1) = 1
fstat64(9, {st_mode=S_IFREG|0644, st_size=16777216, ...}) = 0
mmap2(NULL, 16777216, PROT_READ|PROT_WRITE, MAP_SHARED, 9, 0) = 0xb5627000
stat64("/var/cache/apt/srcpkgcache.bin", {st_mode=S_IFREG|0644, st_size=9153875, ...}) = 0
open("/var/cache/apt/srcpkgcache.bin", O_RDONLY) = 10
fcntl64(10, F_SETFD, FD_CLOEXEC) = 0
fstat64(10, {st_mode=S_IFREG|0644, st_size=9153875, ...}) = 0
mmap2(NULL, 9153875, PROT_READ, MAP_SHARED, 10, 0) = 0xb4d6c000
stat64("/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_edgy_main_binary-i386_Packages", {st_mode=S_IFREG|0644, st_size=4821346, ...}) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Process 29280 detached

then i changed my source.list from de.archive... to archive.... but nothing changed (apt-get update)
fstat64(8, {st_mode=S_IFREG|0644, st_size=9153875, ...}) = 0
mmap2(NULL, 9153875, PROT_READ, MAP_SHARED, 8, 0) = 0xb61f7000
stat64("/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_edgy_main_binary-i386_Packages", {st_mode=S_IFREG|0644, st_size=4832238, ...}) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
Process 29370 detached

dpkg -i .deb works