It's not exactly like this. Before my hanges we used scalable icons rendered by Inkscape's own renderer. Now we still use scalable icons through a standard theming mechanism, but it isn't playing well with the existing code.

Krzysztof: If I remove the hicolor directory I get no icons at all (running ubuntu linux). The previous code worked and let the user change the theme. In the current state, all I got is an incomplete set that I cannot customize. Wouldn't be possible to roll back to the working version and move these changes to a branch?

Gez