WindowTester "enterText" enters repeated characters

Question

I have a WindowTester test which creates a C++ project in Eclipse:

    ui.click(new LabeledTextLocator("&Project name:"));
    ui.enterText(projectName);
    ui.keyClick(WT.CR);

This works fine on Windows, but on Linux it tends to repeat the first character in the project name, so if the project name is "testproj", the text entered in the text field is "tttttttestproj".

Anyone seen this problem and/or have a solution?