Ephox sent the test case to us at /net/cores.central.sun.com/cores/71413024

Here is the reproducible steps

- Open dist/testPage.html and click the button to raise a liveconnect call to the applet.
- A dialog should appear for a few seconds then be disposed.
- From this point on, clicking in the textbox on the page will not place the caret in this field.

I can replicate the problem with JRE 6 update 10, 11, 12, 13, 14 and 15. I can also replicate the problem on JRE 1.5.0_19 and JRE 1.5.0_17. I cannot replicate the problem with JRE 6 update 7.

If I switch to classic plugin on vista and XP issue goes away.

In the customer's code, I noticed

public void setVisible(boolean visible, Runnable runner) {
        if (visible && !isVisible()) {
            new Thread(runner).start();
        }
       
        super.setVisible(visible);
    }

The new thread spins another thread so the drawing code is not on the EDT anymore when cu calls _dialog.dispose();

I ran jstack against Firefox and java when the problem happens. Please see attached