Why does Calc look funny on Windows Vista?
When Calc 5.6 first starts on Windows Vista the menu may run onto two lines (depending on version) and the buttons may be bunched to one side and up against the calculator display. You can correct this by dragging the resize border on the right to make it slightly wider, and possibly extend the border slightly downwards to make the display larger. If you close Calc and restart it the changes should persist.