Comment 1 for bug 373302

Thank you for taking the time to help make Ubuntu better. I've converted your question to a bug report, since what you describe is a bug in software provided with Ubuntu. As a workaround, please try pressing Shift+Enter and let us know if that inserts a new line for you.

I have found an upstream bug report that describes this issue, as well as presents the workaround, so I will set this bug as Triaged and let the developers handle it from here.

Thanks again for taking the time to help make Ubuntu better!