In version 5.1.3 it happens too. Before open the software center and try to update, it doesn't work. For more information about what happend to me, the crash report is attached.
** Attachment added: "_usr_share_software-center_software-center.999.crash" https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/894721/+attachment/2618919/+files/_usr_share_software-center_software-center.999.crash -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to software-center in Ubuntu. https://bugs.launchpad.net/bugs/894721 Title: software-center crashed with SIGSEGV in new_threadstate() Status in “software-center” package in Ubuntu: Confirmed Bug description: Running Precise Pangolin and decided to test drive software center just to see if it was buggy and it crashed upon trying to do a install. ProblemType: Crash DistroRelease: Ubuntu 12.04 Package: software-center 5.1.2.1 ProcVersionSignature: Ubuntu 3.2.0-1.3-generic 3.2.0-rc2 Uname: Linux 3.2.0-1-generic x86_64 ApportVersion: 1.90-0ubuntu1 Architecture: amd64 Date: Fri Nov 25 04:16:46 2011 EcryptfsInUse: Yes ExecutablePath: /usr/share/software-center/software-center InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111125) InterpreterPath: /usr/bin/python2.7 PackageArchitecture: all ProcCmdline: /usr/bin/python /usr/bin/software-center ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SegvAnalysis: Segfault happened at: 0x4dbe28: mov 0x8(%rbp),%rax PC (0x004dbe28) ok source "0x8(%rbp)" (0x00000008) not located in a known VMA region (needed readable region)! destination "%rax" ok SegvReason: reading NULL VMA Signal: 11 SourcePackage: software-center StacktraceTop: ?? () PyGILState_Ensure () ?? () from /usr/lib/python2.7/dist-packages/gi/_gobject/_gobject.so g_datalist_clear () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 Title: software-center crashed with SIGSEGV in PyGILState_Ensure() UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/894721/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp