Created attachment 22323 [details]
Test workbook

Version: 3.1-FINAL-20080629 (not in the version listbox)

After upgrading POI library to version 3.1 FINAL in my project I have found that there is a bug in retrieving fill background color. It returns value 64 for any cell in the worksheet.

I attach sample Excel file (created in Excel 2000 if it does matter), on which the following code fails.

<pre>
    HSSFSheet sheet = workBook.getSheet( "Sheet1" );
    HSSFRow row = sheet.getRow( sheet.getFirstRowNum() );
    StringBuilder sb = new StringBuilder( "Background color test:\n");
    boolean flag = false;
    for( short colIx = row.getFirstCellNum(); colIx < row.getLastCellNum(); colIx++ )
    {
      HSSFCell cell = row.getCell( colIx );
      if( cell == null )
      {
        continue;
      }
      short bgColor = cell.getCellStyle().getFillBackgroundColor();
      if( bgColor != 64 )
      {
        flag = true;
      }
      sb.append( "Column " ).append( colIx ).append( " has background color index " )
          .append( bgColor ).append( "\n" );
    }
    System.out.println( sb.toString() );
    assertTrue( flag );
</pre>