My error in the logfile looks different but I've got the exact same bug as Hanine. See the last entry in my attached logfile.
** Attachment added: "software-center.log" https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/1067914/+attachment/3470721/+files/software-center.log -- 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/1067914 Title: Cannot submit software review (unknown network error) on Ubuntu 12.10 Status in “software-center” package in Ubuntu: Confirmed Bug description: Simply : - Open Software Center - Select a software already installed - Click on "Write your own review" - Write your own review and star the software. - Click on Publish. - Review gets in queue for submitting - After about one minute, the review could not be submitted (Network error but no reason specified) Cannot find anything useful in logs through log viewer or dmesg ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: software-center 5.4.1.2 ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5 Uname: Linux 3.5.0-17-generic x86_64 ApportVersion: 2.6.1-0ubuntu3 Architecture: amd64 Date: Wed Oct 17 21:11:55 2012 InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120905.2) PackageArchitecture: all SourcePackage: software-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/1067914/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

