package unrar 1:3.9.3-1 failed to install/upgrade: error writing to '<standard output>': Input/output error

It logged me out of x and a needed to sign in again. After I logged in it said that the package failed to install but rar files worked perfectly in archive manager.

sudo apt-get install unrar

Description: Ubuntu
Release: 9.10

unrar:
  Installed: 1:3.9.3-1
  Candidate: 1:3.9.3-1
  Version table:
 *** 1:3.9.3-1 0
        500 http://ftp.iinet.net.au karmic/multiverse Packages
        100 /var/lib/dpkg/status

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz
stepping : 6
cpu MHz : 1596.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow
bogomips : 4266.49
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz
stepping : 6
cpu MHz : 1596.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow
bogomips : 4266.96
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

MemTotal: 4058160 kB
MemFree: 1616784 kB
Buffers: 137844 kB
Cached: 1496288 kB
SwapCached: 0 kB
Active: 1170072 kB
Inactive: 984964 kB
Active(anon): 557608 kB
Inactive(anon): 12 kB
Active(file): 612464 kB
Inactive(file): 984952 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 6024332 kB
SwapFree: 6024332 kB
Dirty: 180 kB
Writeback: 0 kB
AnonPages: 521048 kB
Mapped: 173772 kB
Slab: 126620 kB
SReclaimable: 108288 kB
SUnreclaim: 18332 kB
PageTables: 24988 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 8053412 kB
Committed_AS: 1439012 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 104924 kB
VmallocChunk: 34359621627 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 311136 kB
DirectMap2M: 3883008 kB

00:00.0 Host bridge: Intel Corporation 82975X Memory Controller Hub
00:01.0 PCI bridge: Intel Corporation 82975X PCI Express Root Port
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.4 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express Port 5 (rev 01)
00:1c.5 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express Port 6 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 RAID bus controller: Intel Corporation 82801GR/GH (ICH7 Family) SATA RAID Controller (rev 01)
01:00.0 VGA compatible controller: nVidia Corporation NV44 [Quadro NVS 285] (rev a1)
05:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
3f:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5755 Gigabit Ethernet PCI Express (rev 02)

ProblemType: Package
AptOrdering:
 unrar: Install
 unrar: Configure
Architecture: amd64
Date: Wed May 26 11:20:08 2010
DistroRelease: Ubuntu 9.10
ErrorMessage: error writing to '<standard output>': Input/output error
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
NonfreeKernelModules: nvidia
Package: unrar 1:3.9.3-1
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
SourcePackage: unrar-nonfree
Title: package unrar 1:3.9.3-1 failed to install/upgrade: error writing to '<standard output>': Input/output error
Uname: Linux 2.6.31-20-generic x86_64