Joost's advice about using Perl 5.8.0 is on the mark,.
even if your HTML input data is not unicode -- and it's very
likely that your data is something other than unicode, such as ShiftJIS
or god-knows-what (I hope you know which encoding you are
dealing with).
Not only are perl-5.8.0's strings stored as utf8 internally,
but the Encode module, which is part of the 5.8.0 distribution,
provides the means for converting back and forth between
utf8 and a wide assortment of alternate character sets,
including all the major (pre-unicode) Japanese standards,
as well as the other
forms of unicode (i.e. utf16, big- or little-endian).
And the new tricks that you get to do with regex matches,
involving predefined unicode character classes, are truly awesome.
Not only do you avoid nefarious corruptions of multi-byte
characters completely, but you get to match characters
according to what they really are.
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