$lang = "ja_JP";
putenv ("LANG=".eregi_replace('.*_','',$lang)); 
putenv("LC_ALL=$lang");
setlocale(LC_ALL, "");

bindtextdomain("horde", "C:\Program Files\Apache Group\Apache\web\horde\locale");

textdomain("horde");
echo gettext('Addressbook')    ."\n"; //Returns some japaneese chars..
echo gettext('Delete')         ."\n"; //Returns some japaneese chars..

echo gettext('Birthday') ."\n"; //PHP hangs.. 
echo gettext('Mail')     ."\n"; //PHP hangs.. 
echo gettext('Daily')    ."\n"; //PHP hangs.. 

/*
In HEX:
Birthday: 92 61 30 b6 93 fa
Mail:	  93 64 8e 71 83 81 81 5b 83 8b
Daily:    96 88 93 fa

The only char in common for all 3 is $93
thats #147 in dec..
*/

$test = chr(147);
echo $test;
echo _($test);
// I copy $93 to the $test variable.. Then print $test then print gettext($test)..
// All theese work perfectly, so it seems its not a general problem in php..