I started to use KDE a few days ago, when Kubuntu 9.10 was released. I used Gnome and its applications under Ubuntu 9.04, but I'm trying to get used to KDE now. I use as many KDE native applications as possible, but there are some better Gnome apps such as Synaptic, GIMP, Bluefish... I have a laptop with small screen resolution, so I'm using DejaVu Sans 8. Gnome applications completely ignore these settings and use their big fonts. I customized Firefox and Thunderbird in their userChrome.css file, but I can't do anything with other apps. Any suggestions?

To customise the fonts GNOME applications use, you will need to either:

1) Use the Gtk KCM in System Settings > Appearance. You may not have this module.

2) Use the native tools provided by GNOME.

It works only with Raleigh theme that's not very nice. But when I use QtCurve the fonts are still big. Is there any way how can I configure QtCurve?

EDIT: The problem is solved. QtCurve uses KDE font settings, but when you have just installed OS there aren't any settings for GTK applications. So I only changed font to any other and then changed it back and it works.