Just spoke with the KDE_VDG team and there is no HIG guideline about using the dark theme as default. (One will be written soon.)
Basically as long as the user can set the white theme back to default (or whatever one chooses), it is alright to set the dark theme to be default. The team asked if there are any icons that we'd like them to help us with... let me know. Cheers -- 1111.1010.r.i.1101|n.o.i.s.1110|i.m.1010.g.1110|مقاومة fsf member #5439 usuario GNU/Linux #471966 |_|0|_| |_|_|0| |0|0|0| <a href="http://www.gunga.com.br">gunga</a> <a href="http://www.tempoecoarte.com.br">tempoecoarte</a> <a href="http://www.atelier-labs.org">atelier-labs</a> <a href="http://www.mocambos.net">rede mocambos</a>