setting line to invisible

a minor bug i noticed:
i create a set of staves from voice, such as soprano or (general) voice. i made 12 such staves. i then set everything to invisible, because i basically want staff paper =) to write on. i print and it looks great. then i save and close. when i reopen, the vertical line which connects all the staves turns back to visible. so every time i want to print staff paper, i have to set the vertical line back to invisible.
not a big deal. just thought i would try to help improve the awesomeness of an already awesome program.

thanks,
ryan