http://aurora.ru.oracle.com/functional/faces/RunDetails.xhtml?names=271403.JAVASE_EMBEDDED_PROMOTION_TESTCYCLE_8_ALL-21
RULE closed/java/awt/Focus/InactiveWindowTest/InactiveFocusRace Exception java.lang.RuntimeException: Button2 didn't become focus owner

To reproduce:
go to bus2001047.us.oracle.com
/net/aurora-ds/data/export/aurora/sca/embedded/builds/8/b101/jdk/linux-i586/bin/javac InactiveFocusRace.java
/net/aurora-ds/data/export/aurora/sca/embedded/builds/8/b101/jdk/linux-i586/bin/javac InactiveFocusRace.html
/export/local/aurora/CommonData/jtreg_dir/win32/bin/jtreg -verbose:all -testjdk:/net/aurora-ds/data/export/aurora/sca/embedded/builds/8/b101/jdk/linux-i586/ -dir:/export/users/rmatafon/ InactiveFocusRace.html

Test will pass from time to time. Mostly fail.
To make test pass ever, add code:

try {
Thread.sleep(1000);
} catch (Exception e) {
System.out.println("Oops");
}

after (line 83):

        inactiveFrame.setVisible(true);
        activeFrame.setVisible(true);

BTW, test fails from time to time on my Core i5 notebook.