I just though to widen the likelihood of someone who could actually help noticing it; if you have French in your head, please have a look at
this thread in Repair. There's an explanation of the problem in French in post #13 which hopefully some usefully bilingual person will be able to unravel or lay out for us sad monoglot types.
edit: Of course, this would be more useful if I'd put in into the
Writing Instruments forum as I'd meant to.

Mods, please help someone who's not only unilingual but also clumsy.