Linux font anti-aliasing

Hello, i can't set nice (anti-aliased) font for Rubymine running on Debian Lenny + KDE 3.5.X.
Default font/look settings or my custom setting have both bad looking (not anti-aliased) font.

Screenshot in attachment.

Settings > Editor
     Override default fonts by (Deja Vu Sans, 12)
     Look and Feel (Alloy, Bedoin Theme) (i tried differend but it doesn't helps)

Settings > Editor > Appearance
     Use antialiased font (enabled)

Is there any way to make it antialiased?