Backspace, Enter and more keys do not work when numlock is on

When NUMLOCK is on, then some keys are not functional. For example ENTER, BACKSPACE, ARROW KEYS and more.


bash-3.00$ java -version
java version "1.5.0_07"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-b03)
Java HotSpot(TM) Server VM (build 1.5.0_07-b03, mixed mode)
This problem occures in the java version "1.5.0_08" on Solaris Nevada build 45. The same problem ocurres on Solaris 10u1 with all patches as well. Java6 is OK. Java 1.5 is OK on sparc platform too. I use following version of X server:

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bash-3.00$ /usr/X11/bin/Xorg -version

X Window System Version 6.9.0 (Sun Xorg Release 1.2 for Solaris 11)
Release Date: 21 December 2005
X Protocol Version 11, Revision 0, Release 6.9
Build Operating System: SunOS 5.11 snv_41 i86pc
Current Operating System: SunOS hlipa 5.11 snv_45 i86pc

SUNWxorg-server package version: 6.9.0.5.11.4500,REV=0.2006.07.18
SUNWxorg-graphics-ddx package version: 6.9.0.5.11.4500,REV=0.2006.07.18
        Before reporting problems, check http://sunsolve.sun.com/
        to make sure that you have the latest version.
Module Loader present
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Usage JDS or CDE does not have any effect - problem is avaliable on both window manager.