About the workaround as stated in comment #32 : I think it's libreoffice-gtk that needs to be uninstalled (or both).
Regarding the newest LibreOffice version 4.0.1-rc2, you may also be interested in other bugs related to Unity's global menu integration (at least in Ubuntu 12.04 precise ) and that can be worked around in the same way :
- no icons, check signs and highlight in the menus #1153350
- broken menus after use or equation editor in Writer bug #1073266
this one you cannot work around this way :
- no HUD (at least in Writer) bug #1045353
About the workaround as stated in comment #32 : I think it's libreoffice-gtk that needs to be uninstalled (or both).
Regarding the newest LibreOffice version 4.0.1-rc2, you may also be interested in other bugs related to Unity's global menu integration (at least in Ubuntu 12.04 precise ) and that can be worked around in the same way :
- no icons, check signs and highlight in the menus #1153350
- broken menus after use or equation editor in Writer bug #1073266
this one you cannot work around this way :
- no HUD (at least in Writer) bug #1045353