Multiple currency report - Korea symbol problem

We are on 10.1.3.4.2. The report needs to display multiple currency symbols. Few symbols are working fine. However Korea currency shows a rectangular box instead of it's currency symbol.
Is there any work around if it's a bug or limitation?


Report code
Currency Symbol Test
Currency Code    Symbol Using Currency Formatter
<?for-each:CurrencyTest?><?CurrencySymbol?>    <?format-currency:’12345.67890’;CurrencySymbol;‘true’?>
<?end for-each?>

Sample Data
- <CurrencyTest>
  <CurrencySymbol>KPW</CurrencySymbol>
  </CurrencyTest>
- <CurrencyTest>
  <CurrencySymbol>KRW</CurrencySymbol>
  </CurrencyTest>
- <CurrencyTest>
  <CurrencySymbol>ZAR</CurrencySymbol>
  </CurrencyTest>
- <CurrencyTest>
  <CurrencySymbol>JPY</CurrencySymbol>
  </CurrencyTest>


Output
KPW ?12,345.68 (It's rectangle box before number)
KRW ?12,346 (It's rectangle box before number)
ZAR R12,345.68
JPY ¥12,346