Input focus not working with multiple applets on solaris 9 sparc in CTE regression test

Testsuite name: CTE Regressions manual
JDK/JRE tested:
5u24b08-j4b(jdkfb-1_5_0_24-rev-bin-b08-solaris-sparc-04_may_2010.sh)
OS/architecture: solaris9-sparc
Reproducible: Always
Reproducible on machine:
[If sometimes] Also reproducible on machine:
Is it a platform specific regression: N
[If yes] Is it a new platform support: N
[If yes] Regression relative to OS version:
Is it a Regression :N
[If yes] Regression introduced in release/build:
Test result on FCS:
Test run log location:

Steps to reproduce:
1. Test case: java/awt/Focus/NoFocusOwner/4907493/Test4907493.java
Open a browser(ff2/netscape) and load the following page
    http://jpseuwt-ap/testcases/142/4907493/load.html
  Two applet will be loaded with 2 textfield in each of it
2. Click on the first applet's textbox, and type something.
3. Then click on the second applets textbox and type something.

Check:
If you are able to type on 2nd applet's textbox - test PASSED,
If you are NOT able to type on 2nd applet's textbox - test FAILED

#Expected behavior:
Type into the text fields in both the applets and both applets will receive
input focus.

#Actual behavior:
Try to type into the text fields in both the applets and observe that one of
the applets can't receive input focus correctly and it is impossible to type
text into textfileds of that 2nd applet.

#validation:
1.same build/solaris10-x86/ff3.5:Pass
2.same platform/5u24b07-j4b:Fail
3.same platform/6u20b02-j4b:Pass
4.same platform/5u21b03-j4b:Fail
5.same build/solaris10-sparc/ff3.5:Pass


#Exceptions:
None.