I got this error after running an update on 11.10-->Update Manager-->Chose Restart From 'Power' Menu due to message 'This system needs a restart to apply updates' (Unity). After Reboot I logged into Gnome3 and this error popped up almost immediately.
** Attachment added: "Xorg.0.log" https://bugs.launchpad.net/ubuntu/+source/libx11/+bug/507062/+attachment/2476910/+files/Xorg.0.log -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libx11 in Ubuntu. https://bugs.launchpad.net/bugs/507062 Title: synaptic assert failure: synaptic: ../../src/xcb_io.c:385: _XAllocID: Assertion `ret != inval_id' failed. To manage notifications about this bug go to: https://bugs.launchpad.net/xlibs/+bug/507062/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

