Hello,
Just a little patch:
--- imp/mailbox.php.orig	Sat Jan  4 15:58:12 2003
+++ imp/mailbox.php	Sun Jan  5 21:38:08 2003
@@ -398,7 +398,7 @@
 
     if (isset($h->size)) {
         $msg['size'] = ($h->size > 1024)
-            ? sprintf('%.0fkb', $h->size / 1024)
+            ? sprintf(_('%.0fkb'), $h->size / 1024)
             : $h->size;
     }
 
Regards,
-- 
Th. Thomas.