I changed my KDE icon theme to KFaenza (but it doesn't matter: happens with any other icon theme I choose) and would like to have consistent icons across both KDE applications and GTK applications.
However, no matter which theme I choose, the GTK applications still use another theme (looks like it's Oxygen). For an example of what I mean, look at this picture and compare the first icon in each toolbar (the icon for the new file feature of both programs) - the Qt program (top) shows the correct icon, but the GTK (bottom) doesn't:
This happens even if I use another program (like lxappearance) to set the icon theme manually. I have Fedora 20 with KDE 4.11.4. What to do?