Netscape мать его так!

Глобально --- /usr/X11R6/lib/X11/app-defaults/Netscape.
Но лучше в своем ~/.Xdefaults. Тебе не это надо:
! Netscape

Netscape*fontList: -*-helvetica-medium-r-normal-*-*-120-*-*-*-*-koi8-r
Netscape*XmTextField.fontList: -*-courier-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*XmText.fontList: -*-courier-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*XmList*fontList: -*-courier-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*menuBar*fontList: -*-helvetica-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*menuBar*historyTruncated.fontList: -*-helvetica-medium-o-*-*-*-120-*-*-*-*-koi8-r
Netscape*popup*fontList: -*-helvetica-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*topArea*fontList: -*-helvetica-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*topArea*XmTextField.fontList: -*-courier-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*topArea*XmText.fontList: -*-courier-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*mouseDocumentation.fontList: -*-helvetica-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*docinfoButton.fontList: -*-helvetica-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*mailto*urlLabel.fontList: -*-helvetica-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*licenseDialog*text.fontList: -*-courier-medium-r-*-*-*-120-*-*-*-*-koi8-r
Netscape*XmLGrid*fontList: -*-helvetica-medium-r-*-*-*-120-*-*-*-*-koi8-r,-*-helvetica-bold-r-*-* \
-*-120-*-*-*-*-koi8-r=BOLD, -*-helvetica-medium-o-*-*-*-120-*-*-*-*-koi8-r=ITALIC

А вообще поставь постарше (4.6ХХ) версию !!!!!!!