It would appear to be this bug: https://bugzilla.gnome.org/show_bug.cgi?id=719681
which was fixed in goffice 0.10.10 which was released concurrently with gnumeric 1.12.10. See http://www.gnumeric.org/announcements/1.12/gnumeric-1.12.10.html
Utopic has gnumeric 1.12.17 so backporting that to Trusty would appear to be one option.
It would appear to be this bug: https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 719681
which was fixed in goffice 0.10.10 which was released concurrently with gnumeric 1.12.10. See http:// www.gnumeric. org/announcemen ts/1.12/ gnumeric- 1.12.10. html
Utopic has gnumeric 1.12.17 so backporting that to Trusty would appear to be one option.