Have this issue too on 10.10 Backport of KDE 4.6.
For me, an I found an easy fix here: http://kubuntuforums.net/forums/index.php?topic=3115432.0
1. Install qtcurve:
sudo apt-get install qtcurve
2. Select qtcurve in SystemSettings under GTK+ Application settings.
3. Go to home directory, search gtkrc-2.0-kde4, copy and rename it to .gtkrc-2.0.
4. Restart / Logout + Login
Have this issue too on 10.10 Backport of KDE 4.6.
For me, an I found an easy fix here: http:// kubuntuforums. net/forums/ index.php? topic=3115432. 0
1. Install qtcurve:
sudo apt-get install qtcurve
2. Select qtcurve in SystemSettings under GTK+ Application settings.
3. Go to home directory, search gtkrc-2.0-kde4, copy and rename it to .gtkrc-2.0.
4. Restart / Logout + Login