The URL is not encoded in case of group browser. So when you enter Japanese characters and do a search, and navigate to the next page, the Japanese search text looks corrupted. Please see the reproduction sequence attached. This happens on IE6.

Example:
<a href="dosearchgroupsnopermissions.action?groupnameTerm=理&key=PAP&actionName=dosearchgroupsnopermissions.action&onPopupSubmit=setgroupsToAddTextField&startIndex=10">次へ >></a>