diff -durN samba.old/source/lib/util_str.c samba/source/lib/util_str.c
--- samba.old/source/lib/util_str.c 2004-05-11 08:19:38.000000000 +0400
+++ samba/source/lib/util_str.c 2004-06-02 16:49:28.000000000 +0400
@@ -1408,11 +1408,14 @@
 	/* I assume that lowercased string takes the same number of bytes
 	 * as source string even in UTF-8 encoding. (VIV) */
 	len = strlen(s) + 1;
+
+	int errnosave = errno;
 	errno = 0;
 	unix_strlower(s,len,s,len);	
 	/* Catch mb conversion errors that may not terminate. */
 	if (errno)
 		s[len-1] = '\0';
+	errno = errnosave;
 }
 
 /**