After upgrading Ubuntu, this strange behaviour has finished. Now I can correctly paste from Emacs to other Gnome apps. One of the updated packages has fixed this problem.
** Changed in: emacs21 (Ubuntu) Status: Unconfirmed => Rejected ** Changed in: emacs21 (Ubuntu) Status: Rejected => Fix Committed -- Edgy: cannot paste text in Gnome apps from Emacs https://launchpad.net/bugs/55631 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs