I'm running Ubuntu 12.10 AMD64 with updates from quantal-proposed, and I can confirm what Alain mentioned in comment #121, point 8 (menus have no effect after re-opening a file with Calc a few times), BUT, if I then close Calc, open a gEdit window, close it, THEN reopen the document with Calc, the menus start to work again.
I'm running Ubuntu 12.10 AMD64 with updates from quantal-proposed, and I can confirm what Alain mentioned in comment #121, point 8 (menus have no effect after re-opening a file with Calc a few times), BUT, if I then close Calc, open a gEdit window, close it, THEN reopen the document with Calc, the menus start to work again.