KDE4 and Iceweasel (Firefox)

Your Firefox (Iceweasel) looks really bad under KDE 4? Wicd and Gimp are ugly? Thunderbird (Icedove) borders, buttons and menu are broken?
Tweaking Gnome Apps to change theirs look & feel on KDE is simple. Follow three steps described below and repair almost all GTK applications appearance under new KDE.

Tweaking Gnome applications under KDE 4 on Debian Sid (Solution of this problem with other distro should be similar)

1. At first open konsole and type there:
   sudo aptitude install gtk-qt-engine-kde4 kwin-style-qtcurve kde-style-qtcurve gtk2-engines-qtcurve
2. Configure KDE. Open: K menu->System settings->Appearance. Choose GTK styles and fonts tab, and select there:
   
   • GTK styles: “Use another style: QtCurve
   • GTK fonts: “Use my KDE fonts in GTK applications”
3. Click Apply and reboot system. After reboot your Iceweasel should look like on screen attached below.