It was a mistake by Ubuntu GNOME Team, they will patch it as soon as possible. No need to worry, this has already been
reported on Launchpad. You can have look at the
Quoting the official Ubuntu GNOME Page:
Ubuntu GNOME Team is aware of this issue. It was too late, due to the final freeze, to change that.
This will be changed right after the final release of Ubuntu GNOME
14.04 LTS and it should end up with the GNOME Logo and "Version 3.10" :)
Update: 10th May This issue has been fixed. Take a look at Comment #11 of bugreport