This is a bug and not a papercut.
Thank you for taking the time to report this bug and helping to make Ubuntu better.
Please execute the following command, as it will automatically gather debugging information, in a terminal:
This will help us to find and resolve the problem. Thanks in advance!
When reporting bugs in the future please use apport, using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.