I've done some more digging around, and it now looks more likely that
the culprit is the mappings in the file:
/usr/share/X11/locale/el_GR.UTF-8/Compose
which belong to the package "libx11-data".
** Package changed: gtk+3.0 (Ubuntu) => ubuntu
** Package changed: ubuntu => libx11 (Ubuntu)
--
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to libx11 in Ubuntu.
https://bugs.launchpad.net/bugs/1025291
Title:
Compose key yields incorrectly accented Greek characters when using
Greek keymap
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libx11/+bug/1025291/+subscriptions
_______________________________________________
Mailing list: https://launchpad.net/~ubuntu-x-swat
Post to : [email protected]
Unsubscribe : https://launchpad.net/~ubuntu-x-swat
More help : https://help.launchpad.net/ListHelp