[xsl] Saxon message: bad continuation of multi-byte UTF-8 sequence

[DR C LITTLETON <c dot littleton at history dot bbk dot ac dot uk>]

I am getting a strange error message when I try to process three of my
files with Saxon 6.2.2. The processor spits back the message:
LIne: -1
Column: xxxxx (depends on which of the three files I am working with)
Bad continuation of multi-byte UTF-8 sequence (character code 0x22/ 0x65)
[The third file has]
Unsupported five or six byte UTF-8 sequence (character code 0xfc)

The very first line on all my many files is the processing instruction
<?xml version="1.0" encoding="UTF-8" standalone="no"?> followed on the
next line by my
Document Type Declaration. Pretty standard, I would think, and the same
first two lines have presented no problem to the over thirty other files
in which they also appear and which are processed normally. 
>From what little I understand of UTF-8 I gather that 0x22 is a quotation
mark, 0x65 is the letter 'e' and 0xfc is 'u' with umlaut. But beyond that
I don't know how to analyse this error message or get beyond it, let alone
access line -1 (!) to tinker with it.
I have also tried cutting and pasting the text part of the file to a new
file and writing the processing instruction and Document Type Declaration
from scratch, just in case any strange coding snuck in the other version
somehow. no luck with that, though.
Any help for a novice still feeling his way in XSLT would be greatly
appreciated.

Charles Littleton
Robert Boyle Project
Birkbeck College


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