I can confirm this on my system too. The only workaround is to use the keyboard shortcuts (i.e. CTRL-C to copy the selection, CTRL-V to paste the selection).
-- Copy/select doesn't work from Compose header fields https://launchpad.net/bugs/17520 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
