Comment 45 for bug 168164

> Should we encourage users to not use these standard SVG units
> because some "other" programs don't render those units correctly

Some "other" SVG renderers (i.e. all tested web browsers as well as Inkscape's reference SVG implementation batik) being incorrect is not the underlying issue AFAIU: Inkscape neglects to define a viewBox for the chosen page size and simply relies on other SVG renderers to also use 90dpi internally - the SVG 1.1 specification however does not enforce 90dpi (only recommend): SVG renderers are free to define the size of the reference pixel (web browsers commonly use 96 dpi, Scribus for example uses 72dpi) - without being non-compliant to the SVG 1.1. specification.

Anyway - I'll bow out of this discussion (I probably shouldn't have commented here at all, sorry for the distraction it caused).