IME can not be turned on when I use NetBeans with JDK1.6 on Solaris.

Environment:
  Java: 1.6.0-rc-b96
  NetBeans IDE 5.0 (Build 200603142030)
http://www.netbeans.info/downloads/download.php?type=5.0
We can use English version for testing.
  SunOS 5.10 Generic_118855-15 (x86)
I'm seeing this problem on Solaris SPARC too.
Latest patches have been applied. ATOK is now based on ATOK17,
IIMF is also updated version (which are not bundled in pure Solaris
10 release). Detail output of `showrev -v` is attached.
  Desktop: JDS
  System locale: ja_JP.eucJP, ja_JP.UTF-8

Step:

1. Start NetBeans with JDK1.6.0 (assuming installed in /opt/jdk1.6.0)

% netbeans --jdkhome /opt/jdk1.6.0

2. Try to turn IME on in any input field
   For example, File>Open Project, select input field then Ctrl+SPACE
   
   but nothing happens. IME is not activated.

3. Try with JDK1.5

% netbeans --jdkhome /opt/jdk1.5.0_07

    Now IME can be turned on.

When I tried JDK1.6 with NetBeans on another platforms - Fedora Core 5,
and Windows XP, it works fine.