Description of problem:
 I am getting IllegalArgumentException from installer on Processing screen while installing EAP on windows.

Version-Release number of selected component (if applicable):
 EAP 6.2.0.ER4

How reproducible:
 always

Steps to Reproduce:
 Just use default values where possible.

Actual results:
 Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: bad position: 49
        at javax.swing.text.JTextComponent.setCaretPosition(JTextComponent.java:1678)
        at com.izforge.izpack.panels.ProcessPanel$1.run(ProcessPanel.java:253)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
        at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
        at java.awt.EventQueue.access$200(EventQueue.java:103)
        at java.awt.EventQueue$3.run(EventQueue.java:694)
        at java.awt.EventQueue$3.run(EventQueue.java:692)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

Expected results:
 No IllegalArgumentException during installation

Additional info:
 - Issue initially caught in BZ1015573
 - I am able to successfully finish installation
 - Regression against EAP 6.2.0.ER3 installer