Here is the debug output for the failure:

pacman -Su

Targets: coreutils-6.5-1 libcups-1.2.7-1 cups-1.2.7-1

Total Package Size: 3.9 MB

Proceed with upgrade? [Y/n]

:: Retrieving packages from current...
failed copying /var/cache/pacman/pkg/coreutils-6.5-1.pkg.tar.gz

warning: failed to get filesize for coreutils-6.5-1.pkg.tar.gz

failed downloading coreutils-6.5-1.pkg.tar.gz from ftp.archlinux.org: 550 Failed to open file.


warning: failed to get filesize for coreutils-6.5-1.pkg.tar.gz

failed downloading coreutils-6.5-1.pkg.tar.gz from ftp.nethat.com: 550 coreutils-6.5-1.pkg.tar.gz: No such file or directory


warning: failed to get filesize for coreutils-6.5-1.pkg.tar.gz

failed downloading coreutils-6.5-1.pkg.tar.gz from ftp-linux.cc.gatech.edu: 550 Failed to open file.


warning: failed to get filesize for coreutils-6.5-1.pkg.tar.gz

failed downloading coreutils-6.5-1.pkg.tar.gz from ftp.ibiblio.org: 550 coreutils-6.5-1.pkg.tar.gz: No such file or directory


connect: Connection refused
error: cannot connect to archlinux.antesis.org
*** glibc detected *** pacman: double free or corruption (fasttop): 0x086b67c8 ***
======= Backtrace: =========
/lib/libc.so.6[0x400a0b10]
/lib/libc.so.6(__libc_free+0x89)[0x400a21a9]
pacman[0x80604ee]
pacman[0x805b731]
pacman[0x805bdeb]
pacman[0x80523c6]
pacman[0x8055335]
/lib/libc.so.6(__libc_start_main+0xd8)[0x400527c8]
pacman[0x804a0a1]
======= Memory map: ========
08048000-0806b000 r-xp 00000000 08:06 27702 /usr/bin/pacman
0806b000-0806c000 rw-p 00023000 08:06 27702 /usr/bin/pacman
0806c000-086d9000 rw-p 0806c000 00:00 0 [heap]
40000000-4001a000 r-xp 00000000 08:06 14083 /lib/ld-2.5.so
4001a000-4001b000 r--p 00019000 08:06 14083 /lib/ld-2.5.so
4001b000-4001c000 rw-p 0001a000 08:06 14083 /lib/ld-2.5.so
4001c000-4001d000 r-xp 4001c000 00:00 0 [vdso]
4001d000-40020000 rw-p 4001d000 00:00 0
40020000-40028000 r-xp 00000000 08:06 14126 /lib/libnss_files-2.5.so
40028000-4002a000 rw-p 00007000 08:06 14126 /lib/libnss_files-2.5.so
4002b000-4003c000 r-xp 00000000 08:06 37361 /usr/lib/libz.so.1.2.3
4003c000-4003d000 rw-p 00011000 08:06 37361 /usr/lib/libz.so.1.2.3
4003d000-40161000 r-xp 00000000 08:06 14094 /lib/libc-2.5.so
40161000-40162000 r--p 00124000 08:06 14094 /lib/libc-2.5.so
40162000-40164000 rw-p 00125000 08:06 14094 /lib/libc-2.5.so
40164000-40235000 rw-p 40164000 00:00 0
4023a000-4023e000 r-xp 00000000 08:06 14117 /lib/libnss_dns-2.5.so
4023e000-40240000 rw-p 00003000 08:06 14117 /lib/libnss_dns-2.5.so
40240000-4024e000 r-xp 00000000 08:06 14116 /lib/libresolv-2.5.so
4024e000-40250000 rw-p 0000d000 08:06 14116 /lib/libresolv-2.5.so
40250000-4026a000 rw-p 40250000 00:00 0
40277000-40281000 r-xp 00000000 08:06 32893 /usr/lib/libgcc_s.so.1
40281000-40282000 rw-p 00009000 08:06 32893 /usr/lib/libgcc_s.so.1
40300000-40321000 rw-p 40300000 00:00 0
40321000-40400000 ---p 40321000 00:00 0
bf9d7000-bf9ed000 rw-p bf9d7000 00:00 0 [stack]
Aborted