Comment 10 for bug 408651

Thank you, Bryce! In my opinion you have summarized the problem right.

I cannot check /etc/default/console-setup and setxkbmap -print, because I have changed my computer.

I think I have found out why there is a difference between 2a and 2b.
I suppose, the reason for a difference between 2a and 2b may be that different input methods are set for the different user accounts. The user account where I got 2a was configured to use scim-bridge, and 2b was configured with the default input method.

Having this information, can you reproduce 2b?

Maybe you will find it helpful to read how I solved this problem for myself. I just edited the compose key definitions. This is my thread on ubuntuforums.org
http://ubuntuforums.org/showthread.php?t=1565339