Weird fonts problem in X

[nebu@shaw.wave.ca]

My problem has just got massively weird after installing more programs.

I get messages that seem to indicate some fonts are missing, but I can't
figure out how to fix it. If anyone has a clue please tell me!

Here's what Netscape says when it tries to run:
Warning: Cannot convert string
"-*-helvetica-bold-r-*-*-*-120-*-*-*-*-iso8859-*" to type FontStruct

Gimp says:
**WARNING **: file gdkfont.c: line 115 (gdk_font_ref): "font != NULL"
and it does not run.

I have fntbase, fnt75, fnt100, fntscl all installed.

Any clues?

Thanks in abundance