Is a bug "know" bug.
https://bugs.launchpad.net/inkscape/+bug/1507049

Thanks for the info!

El dom, 20-03-2016 a las 11:58 +0000, C R escribió:
> I re-installed 0.91 stable release, and opened the same file
> generated by
> inkscape-trunk, to see what would happen.
>
> As expected, Inkscape 0.91 (r13725) interperets the offset correctly.
> I
> jiggled the offset handle a little so Inkscape detected a change,
> then
> re-saved the file.
> Here is the re-saved result for comparison (open in browser to see
> the
> difference):
> http://www.opendesignstudio.org/inkscape/inkscape_dynamic_offset_0.91
> _stable.svg
>
> Also, here is a gif animated comparison of the old offset and new on
> the
> same shape:
> http://www.opendesignstudio.org/inkscape/dynamic_offset_old_new_compa
> rison.gif
>
> -C
>
>
>
>
> On Sun, Mar 20, 2016 at 10:21 AM, C R <cajhne@...400...> wrote:
>
> >
> >
> > You have an idea how much time could this bug happen?
> > >
> > >
> > Unfortunately, it happens on every shape I've tried. It's 100% of
> > the
> > time, as far as I can tell.
> > Before, I got perfect shapes every time.
> > Now, all the vectors have either a slightly corrupt, or very wavey
> > and
> > corrupt result after applying the offset.
> > It's almost as if the algorithm is trying to apply a smooth effect
> > or
> > something.
> >
> > The result should be the same as applying a very thick line to the
> > shape,
> > then converting stroke to path, and deleting the interior of the
> > stroke.
> > This effect must be perfect. It should not have to guess or
> > estimate
> > anything, and should be pristinely uniform.
> >
> > Whatever was done to the calculation of the offset needs to be
> > reverted
> > back to the way it was.
> >
> > Thanks again for your help, Jabier.
> >
> > -C
> >
> >