[Inkscape-user] Automatic replacement of ss

Hi all,

I'm using Inkscape 0.91 on Ubuntu 12.04.

With some fonts, when entering a double s ("ss") in a text block, it is automatically replaced with a sharp s (http://en.wikipedia.org/wiki/%C3%9F). However, sharp s is always incorrect spelling in Switzerland.

This problem appears with all fonts of the ADF family and with Verana, but not with many others.

I suppose this is an Inkscape feature. If so, how can I turn it off?

Thanks in advance.

Regards, Stefan