Reproduction:

1. Extract/Compile the attached test case, rep_4514593.java.
2. Execute it in ja/ja_JP.UTF-8 locale.
   % java rep_4514593
3. Select 4th item from the Choice in the test case.

You can see the following warning each selection.

Warning:
    Ì¾Á°: Text
    ¥¯¥é¥¹: XmTextField
    Ê¸»ú '' ¤Î¥Õ¥©¥ó¥È¤Ï¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Þ¤»¤ó¡£ÇË´þ¤·¤Þ¤¹¡£

This problem occurs only on Solaris/Linux but not on Windows,
and also in ja/ja_JP.UTF-8 locale but not in ja_JP.PCK locale.

This problem still remain since 1.4.0 (merlin) release.
(see 4514593)