testcase 4774166 is failing on Linux but passing on Solaris and Windows with Tiger JDKS.

Testcase from regression workspace, bug4774166.java is failing on Linux but passing on Solaris and Windows platforms with Tiger JDKS.

Testcase Location:
==================
/net/urts071.india/export6/testSuites/Regression/workspace_150/test/javax/swing/InputVerifier/4774166/bug4774166.java

JDK:
====
java -version
java version "1.5.0_07-ea"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-ea-b01)
Java HotSpot(TM) Client VM (build 1.5.0_07-ea-b01, mixed mode, sharing)

Operating System:
================
cat /etc/SuSE-release
SUSE LINUX Enterprise Server 9 (i586)
VERSION = 9

Steps to reproduce:
===================
1. Install JDK in test machine.
2. copy attached .java files ( bug4774166.java, JRobot.java and Util.java) into test machine.
3. Compile *.java files with tested JDK with following command:
   <jdk location>/bin/javac *.java
4. Start the test with the following command:
   <jdk location>/bin/java bug4774166

ERROR:
=====
Exception in thread "main" java.lang.RuntimeException: Focus error. Test failed!
        at bug4774166.main(bug4774166.java:153)