Comment 24 for bug 842566

@Michael: I think the first issue you describe is simply the lack of global menu integration for LibreOffice. There is a package "lo-menubar" in the archives, which will install a preliminary LO-addon which will integrate the menu into the global menu. But it seems not to be ready for default inclusion.

The second issue is what this bug report is really about. It makes some LO windows unaccessible, except for Super+W scale mode. This also affects the usability of the global menu integration: I once tried out lo-menubar, and it worked quite well. But if Unity "looses" a LO window, its menu will also not appear in the global menu, and thus there is no way even to close the document. If the menu is displayed in the window (no global menu integration), it will at least stay accessible, even when Unity does not handle it.