The problem is solved by updating empathy to latest version (2.28.1-1ubuntu1). So the problem was not related to butterfly after all.
** Changed in: telepathy-butterfly (Ubuntu) Status: New => Invalid -- Unable to complete connection https://bugs.launchpad.net/bugs/446281 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs