jaxp/src/com/sun/org/apache/xalan/internal/xsltc/runtime/BasisLibrary.java

*** 953,962 ****
--- 953,965 ----
          }
          else {
              if (Double.isNaN(d) || Double.isInfinite(d))
                  return(Double.toString(d));
  
+             //Convert -0.0 to +0.0 other values remains the same
+             d = d + 0.0;
+ 
              // Use the XPath formatter to ignore locales
              StringBuffer result = threadLocalStringBuffer.get();
              result.setLength(0);
              xpathFormatter.format(d, result, _fieldPosition);
              return result.toString();