/usr/bin/owncloud:6:qt_message_fatal:QMessageLogger::fatal:QXcbConnection::QXcbConnection:QXcbIntegration::QXcbIntegration:QXcbIntegrationPlugin::create

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding owncloud-client. This problem was most recently seen with package version 2.2.2+dfsg-1ubuntu0.2, the problem page at https://errors.ubuntu.com/problem/fbcf1e4d5930881530ae3337dfecc7748b36fddd contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/.