When using Microsoft's Word or PowerPoint products to write HTML documents,
when you save as HTML, the program translates certain characters such that
they cause problems with non-Microsoft browsers (e.g. Netscape).

  For example,

Hex Decimal Character
=== ======= =========================
 85   133   Ellipsis (...)
 91   145   Open Single-Quote
 92   146   Close Single-Quote
 93   147   Open Double-Quote
 94   148   Close Double-Quote
 95   149   Bullet
 96   150   En Dash
 97   151   Em Dash
 99   153   Trademark Sign
 A1   161   Inverted Exclamation mark
 A2   162   Cent Sign
 A3   163   Pound Sign
 A4   164   Currency Symbol
 A5   165   Yen Symbol
 A9   169   Copyright Symbol
 AC   172   Not Symbol

and many more.

See http://med.stanford.edu/web/resources/demoroniser.html for a quick and dirty
Perl program, which I downloaded from http://www.fourmilab.ch/webtools/demoroniser
and put in my ~jasper/bin directory.

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There are many, many pages on internationalization, but it's hard to find any
that just tell you how to do it.  I started with

  - http://www.hclrss.demon.co.uk/unicode

  - http://www.hclrss.demon.co.uk/unicode/htmlunicode.html
    for "Creating multilingual web pages"

  - http://ppewww.ph.gla.ac.uk/~flavell/charset/
    for some i18n issues, like the origin of the term "i18n" (pronounced
    "i-eighteen-n") which is an abbreviation of the word "internationalization".
    It has an "i", followed by 18 letters, then an "n".  And you don't have to
    get hung up on whether the "z" is an "s" or not.

  - http://ppewww.ph.gla.ac.uk/~flavell/charset/checklist
    for different ways one might code HTML to handle different languages.

  - http://www.cs.tut.fi/~jkorpela/chars.html
    for a very long tutorial on Character Code Issues.

  - http://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT
    for the mapping of cp1252 characters to Unicode

  - http://rf.net/~james/perli18n.html
    for Perl, Unicode and i18N FAQ

  - http://???
    for how some positions are reservered for local national characters.

  - http://???
    for the warning that \ (backslash, aka reverse solidus) gets displayed as
    the yen sign when using charset=shift_jis, but this only seems to 
    happen when <textarea>inside a textarea field</textarea>.

  - There's a problem where backslashes (also known as a "reverse solidus")
    appear as the yen symbol (a capital Y with 2 horizontal lines in its
    lower half), and the tilde (~) appear as an overline.  According to
    http://www.cs.mcgill.ca/~aelias4/encodings.html,
         This "problem" has become so pervasive that it is no longer a
         problem at all:  Japanese people all know and expect to find
         yen symbols instead of backslashes.  You should think of the
         yen and backslash as just variant ways of writing the same
         character.  Get used to seeing such things as DOS/Windows
         paths separators and escape characters look like yen symbols.