Menus items disappearing in some applications

Binary package hint: unity

I noticed this whilst using SpringSource Tools downloaded from here: http://www.springsource.com/developer/sts
(version 2.6.1 installed from the prepackage Linux 32-bit install)

A number of the menu options that would normally be in the menu seem to be missing or broken.

Under “Ubuntu Classic” when a have a Java source file open I get the following options:
  File, Edit, Source, Refactor, Navigate, Search, Project, Run, Window, Help

Viewing exactly the same file under a “Ubuntu” desktop session I get:
  Edit, Source, Refactor, Navigate, Window

Also the "Window" menu is supposed to have sub menus for the "Open Perspective" and "Show View" options, but instead there is no sub-menu and these options do nothing when selected.

As you can imagine this using this app quite difficult under Unity.

msharman@desktop:~$ lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04

msharman@desktop:~$ apt-cache policy unity
unity:
  Installed: 3.8.12-0ubuntu1
  Candidate: 3.8.12-0ubuntu1
  Version table:
 *** 3.8.12-0ubuntu1 0
        500 http://mirror.internode.on.net/pub/ubuntu/ubuntu/ natty-updates/main i386 Packages
        100 /var/lib/dpkg/status
     3.8.10-0ubuntu2 0
        500 http://mirror.internode.on.net/pub/ubuntu/ubuntu/ natty/main i386 Packages