I looked at the page for reporting bugs and they look over loaded. And I don't have too much information on the bug. It's repeatable.

The bug crash inkscape. It happens when:
I double clicked the

to get the preference menu (or
shift ctrP). Whenever I click on the black line that represents the current stroke selection inkscape gives the error message you see above. I'm running inkscape on Windows Vista Home Premium. I guess the curse disappeared when inkscape crashed. It should be sitting by where it says stroke 000000/1 in the little black box.