This sounds like an Xorg crash, probably caused by a bug in the relevant hardware drivers. Please follow https://wiki.ubuntu.com/X/Debugging to report the crash to Ubuntu.
** Project changed: midori => xorg (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1096308 Title: Soundcloud listening in Midori results in desktop crash Status in “xorg” package in Ubuntu: New Bug description: Listening to soundcloud for about 20 minutes in midori, sudden desktop crash and logout. Went back to soundcloud and continued listening, 15 minutes later same crash. I did have two soundcloud tabs open and a few other web pages but nothing with flash ads or webapps or similar heavy content. I also had the Geary Mail client open at the time. ProblemType: Bug DistroRelease: elementary OS 0.2 Package: elementary-desktop 1.284-0~355~precise1 ProcVersionSignature: Ubuntu 3.2.0-35.55-generic 3.2.34 Uname: Linux 3.2.0-35-generic x86_64 ApportVersion: 2.0.1-0ubuntu15+elementary3~precise1 Architecture: amd64 CrashDB: elementary_meta Date: Sat Jan 5 02:21:20 2013 InstallationMedia: elementary OS 0.2 "Luna" - Beta 1 amd64 (20121114) MarkForUpload: True ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: elementary-meta SuspiciousXErrors: ThirdParty: True UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1096308/+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
