-Dfile.encoding=UTF-8 works, but -Dfile.encoding=GBK table.enterValue(...) reports error

[jamxval]

Comparing using UTF-8 to GBK, only one of them can work, I'm not sure if or not it is a bug of Fest Swing or Swing itself.

command line to work:
java -Dfile.encoding=UTF-8 -cp ... TestFrame

command line to repeate error (My PC is Windows XP Chinese version, GBK is defaulted code page):
java -Dfile.encoding=GBK -cp ... TestFrame

org.fest.swing.exception.ActionFailedException: Unable to make visible the location of the index '0' by scrolling the point (1,-1) on javax.swing.JTextField[name='Table.editor', text='A2', enabled=true, visible=true, showing=true]
at org.fest.swing.exception.ActionFailedException.actionFailure(ActionFailedException.java:33)

I also tried to test if or not cell not found results in such error, but when the cell value not found, the error message is Unable to find cell matching value 'B2DD':

grid.enterValue(grid.cell("B2DD"), "B2*");

file versions:
fest-asset-1.2.jar
fest-swing-1.2.jar
fest-reflect-1.2.jar
fest-util-1.1.2.jar

JRE (x86 version) :
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) Client VM (build 21.0-b17, mixed mode, sharing)

Machine:
Windows XP SP3 Chinese language (GBK is default code page).

Sample Code:

    final JFrame frame = new JFrame();
    frame.setTitle("FEST Swing");
    {
        String[][] matrix = new String[][] { { "A1", "A2", "A3" },
                { "B1", "B2", "B3" } };
        String[] headers = new String[] { "A", "B", "C" };
        JTable g = new JTable(matrix, headers);
        g.setName("Grid");

        frame.getContentPane().add(g);
    }
    frame.setBounds(100, 100, 500, 300);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    FrameFixture target = new FrameFixture(frame);
    target.show();
    JTableFixture grid = target.table("Grid");

    grid.enterValue(grid.cell("A2"), "A2*"); // error reported here.
    grid.enterValue(grid.cell("B2"), "B2*");