Component.requestFocus() fails since Java 6 Update 10

FULL PRODUCT VERSION :
java version "1.6.0_22"
Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
Java HotSpot(TM) Client VM (build 17.1-b03, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
Component.requestFocus() fails in Applets using the next-generation java-plugin.
It works when you use jre prior to 6u10 or switch back to the classic java-plugin (doesn't work with firefox 3.6+ or google chrome).

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :

Go to https://www.elsteronline.de/eportal/

Select the radiobutton "Software-Zertifikat" and click "Login"

Set the cursor in the passwordfield "PIN"

Zoom the applet with Crtl-"+"

Zoom the applet with Crtl-"+" again

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Expected (classic plugin): the cursor is still in the passwordfield
ACTUAL -
Actual (next-generation plugin): the focus is lost

REPRODUCIBILITY :
This bug can be reproduced always.

Release Regression From : 6u22
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.