Quote:
Is this something wrong under my Language Options or default character encoding (ISO-8859-1), or just sloppy HTML coding?

As Roger says, it's sloppy HTML coding -- the quote marks in question are likely to be literal 0x91..0x94 octets inserted by Word or some other Windows-centric editor. However, unless the page has gone so far wrong as to include those characters but still explicitly set an ISO-8859-1 encoding, you can probably solve the problem by setting the default encoding to Windows Codepage 1252. Certainly Mozilla lets you do this, so I assume Firefox does too. Windows Codepage 1252 is the same as ISO-8859-1 except it has all the Windows nonstandard extension characters between 0x80..0x9F, including the quotes.

For reference for those writing their own pages, there were two right ways for the webmaster to have done it: use the character entities ” and “, or switch to UTF-8 encoding and use U+2018 etc.

Peter