Also occurring with other LibreOffice programs on my Oneiric, including Writer, but currently it seems to be occurring only when opening a document by double-clicking in Nautilus. Starting the LibreOffice programs afresh without any document is working correctly and opening a document from the application's menu or toolbar is also working correctly. However, I have not installed lo-menubar. I had installed it earlier and when it was installed, even starting LO programs directly was causing the issue.
Also occurring with other LibreOffice programs on my Oneiric, including Writer, but currently it seems to be occurring only when opening a document by double-clicking in Nautilus. Starting the LibreOffice programs afresh without any document is working correctly and opening a document from the application's menu or toolbar is also working correctly. However, I have not installed lo-menubar. I had installed it earlier and when it was installed, even starting LO programs directly was causing the issue.