emacs broken - displays empty rectangles in place of all characters

["Adam Black" <amadan.korvin@gmail.com>]

Hi folks
I'm a bit of a newbie.  I'm not sure what I've done to break emacs,
but when it pops up now there are no characters, just empty rectangles
- which makes me think the fonts are broken, but I don't know how to
fix them.  I also get this error:

emacs
Warning: Cannot convert string
"-*-courier-medium-r-*-*-*-120-*-*-*-*-iso8859-*" to type FontStruct
Warning: Cannot convert string
"-*-helvetica-medium-r-*--*-120-*-*-*-*-iso8859-1" to type FontStruct


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