software-center crashed with SystemError in open()

Bug appeared when i opened the software center, after a period of waiting without loading the full app.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: software-center 4.1.23.4
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Thu Sep 22 13:34:25 2011
ExecutablePath: /usr/share/software-center/software-center
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-center /home/username/Downloads/rt3090-dkms_2.3.1.7-0ubuntu0~ppa2_all.deb
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/software-center', '/home/username/Downloads/rt3090-dkms_2.3.1.7-0ubuntu0~ppa2_all.deb']
SourcePackage: software-center
Title: software-center crashed with SystemError in open(): E:Could not open file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_oneiric_restricted_binary-i386_Packages - open (24: Too many open files), E:Could not open file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_oneiric_main_binary-i386_Packages - open (24: Too many open files), E:Could not open file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_oneiric_universe_binary-amd64_Packages - open (24: Too many open files), E:Could not open file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_oneiric_multiverse_binary-amd64_Packages - open (24: Too many open files), E:Could not open file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_oneiric_restricted_binary-amd64_Packages - open (24: Too many open files), E:Could not open file /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_oneiric_main_binary-amd64_Packages - open (24: Too many open files)
UpgradeStatus: Upgraded to oneiric on 2011-09-22 (0 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare vboxusers