Created attachment 8986 [details]
Added exception

There is bad value in data/big_file.properties. It already contains
key "key7" and that's why your test case fails. See screen shots of
your test cases. There is an Error dialog in task bar.
Additionally you should change method in PropertiesEditorOperator this
way, because it can throw NPE otherwise:

    public void propertiesEditorClickNewPropertyButton() {
        JButtonOperator jButtonOperator = new JButtonOperator(
                                     new EditorWindowOperator(),
                                     this.BUTTON_NAME_NEW_PROPERTY);
        jButtonOperator.pushNoBlock();
        new QueueTool().waitEmpty();
    }

Also you don't need to catch any jemmy exception (line 153). It
already does JellyTestCase for you and it reports whole stack trace,
so it is easier to track concrete line where an exception was thrown.

[200302180100]
Reopening this issue, bacause I saw this issue on today's build.

There was changed content of  properties file used
in my test.

Timeout expires because it is big file and it takes an incredible
amount of time to scroll to the beginning of the file. To increase
timeout write the following in
PropertiesEditorOperator.selectPropertiesFileItem() method:

  JTableOperator jTableOperator = new JTableOperator(jTable);
  jTableOperator.getTimeouts().
            setTimeout("JScrollBarOperator.WholeScrollTimeout",
                       240000);
  jTableOperator.clickOnCell(rowNumber,1);

But much more better would be to modify test case. For example, close
editor after new keys are created and re-open it. It will open file at
the beginning, so no scrolling is needed.

Verified in dev 20030423.