Vietnamese diacritics not displayed correctly in HTML code

I reached out to Jukka at http://www.cs.tut.fi/~jkorpela/personal.html

He explained the following:
The “View Source” function of a web browser shows what the HTML document contains, and in this case it actually contains the 7 characters"à".

Indeed when I view the index.html file with my html editor the jumbled characters as I was complaining about show up.

Is it then logical to point the finger at the theme? Or, maybe it is Rapidweaver.

Jukka goes on to suggest:
It is possible that RapidWeaver has an option like “Do not escape Latin 1 characters” (possibly with a stranger name) that would prevent it from turning an input of “à” to the reference “à”.

Anybody have any ideas how to troubleshoot a theme or Rapidweaver to solve this problem?

The problem is: Why does RapidWeaver or (the Theme) use “à” for “à” whereas other accented characters are shown correctly.