Well, in the interim, I upgraded (new install, actually...) to Lubuntu 13.10. The problem appears to have been fixed in some version of gucharmap between then and now.
Thank you. -Scott --------------------------------------------------------------------------------------- scott@scott-ASUS-M2N68-AM-PLUS:~$ uname -a Linux scott-ASUS-M2N68-AM-PLUS 3.11.0-12-generic-tuxonice #19~ppa1-Ubuntu SMP Fri Oct 11 06:32:47 UTC 2013 i686 athlon i686 GNU/Linux scott@scott-ASUS-M2N68-AM-PLUS:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 13.10 Release: 13.10 Codename: saucy scott@scott-ASUS-M2N68-AM-PLUS:~$ gucharmap --version GNOME Character Map 3.8.2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1243422 Title: Double-clicking with nothing highlighted yields wrong character To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gucharmap/+bug/1243422/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs