kubuntu@kubuntu:~$ ubuntu-bug ubiquity
Bus::open: Can not get ibus-daemon's address.
IBusInputContext::createInputContext: no connection to ibus-daemon
(process:18534): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
kubuntu@kubuntu:~$ 1414307863430 GMPInstallManager.simpleCheckAndInstallINFO Last check was: 1414307863 seconds ago, minimum seconds: 86400
1414307863430 GMPInstallManager._getURL INFO Using url: https://aus4.mozilla.org/update/3/GMP/%VERSION%/%BUILD_ID%/%BUILD_TARGET%/%LOCALE%/%CHANNEL%/%OS_VERSION%/%DISTRIBUTION%/%DISTRIBUTION_VERSION%/update.xml
1414307863431 GMPInstallManager._getURL INFO Using url (with replacement): https://aus4.mozilla.org/update/3/GMP/33.0/20141013200324/Linux_x86_64-gcc3/en-US/release/Linux%203.16.0-23-generic%20(GTK%202.24.25)/canonical/1.0/update.xml
1414307863433 GMPInstallManager.checkForAddons INFO sending request to: https://aus4.mozilla.org/update/3/GMP/33.0/20141013200324/Linux_x86_64-gcc3/en-US/release/Linux%203.16.0-23-generic%20(GTK%202.24.25)/canonical/1.0/update.xml
1414307864056 GMPInstallManager.onLoadXML INFO request completed downloading document
1414307864058 GMPInstallManager.onLoadXML INFO allowNonBuiltIn: false
1414307864065 GMPInstallManager.simpleCheckAndInstall INFO Found 1 addons advertised.
1414307864065 GMPInstallManager.simpleCheckAndInstall INFO Found addon: gmp-gmpopenh264 (isValid: true, isInstalled: false, isOpenH264: true, hashFunction: sha512, hashValue: 737e49f25aace93d470f1a781c69c3cdd0c9db21afe62221fb171d38a31d8a2b55af01a69cd00e7352e7a34aa450b6b85729509f81582379394785b37997a423, size: 385889)
1414307864965 GMPInstallManager.simpleCheckAndInstall INFO Addon installed successfully: gmp-gmpopenh264 (isValid: true, isInstalled: true, isOpenH264: true, hashFunction: sha512, hashValue: 737e49f25aace93d470f1a781c69c3cdd0c9db21afe62221fb171d38a31d8a2b55af01a69cd00e7352e7a34aa450b6b85729509f81582379394785b37997a423, size: 385889)
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: ubiquity 2.20.0
ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
Uname: Linux 3.16.0-23-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CasperVersion: 1.345
CurrentDesktop: KDE
Date: Sun Oct 26 02:15:50 2014
InstallCmdLine: file=/cdrom/preseed/kubuntu.seed boot=casper maybe-ubiquity initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Kubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)
Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. There have been many changes in Ubuntu since that time you reported the bug and your problem may have been fixed with some of the updates. It would help us a lot if you could test it on a currently supported Ubuntu version. If you test it and it is still an issue, kindly upload the updated logs by running only once:
apport-collect 1385819
and any other logs that are relevant for this particular issue.