You've innocently generated output, using dvips, and there
are weird transpositions in it: for example, the fi ligature has
appeared as a textsterling symbol.
This is an unwanted side-effect of the
precautions
outlined in generating PostScript for PDF.
The -G1 switch discussed in that question is appropriate for
Knuth's text fonts, but doesn't work with text fonts that don't follow
Knuth's patterns (such as fonts supplied by Adobe).
If the problem arises, suppress the -G1 switch: if you were using it
explicitly, don't; if you were using -Ppdf, add -G0 to
suppress the implicit switch in the pseudo-printer file.
The problem has been corrected in dvips v 5.90 (and later versions), which should be available in any recent TeX distribution.
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