DOCBOOK-APPS: redundant pages in index

I produce PDF from DocBook XML using openjade and pdftex.  I want to make an 
index and have finally managed to do this using collateindex.pl.  However I 
am disappointed to find that my index turns out to have considerable 
redundancy .  Indeed the collateindex.pl output warns that:

      Duplicates may be removed in the HTML backend, but in the print
      backends, it is impossible to suppress duplicate pages or coalesce
      sequences of pages into a range.

Is there no way around this?

Thanks in advance for any suggestions.

Matthew


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Matthew Hobbs    +61 2 9036 3004
BioLateral Pty Ltd          http://www.biolateral.com.au/
Level 5, 92 Parramatta Rd, Camperdown, NSW 2050 Australia