Index: passdb/pdb_smbpasswd.c
===================================================================
--- passdb/pdb_smbpasswd.c	(revision 17238)
+++ passdb/pdb_smbpasswd.c	(working copy)
@@ -1192,6 +1192,7 @@
 			      struct samu *sam_pass, const struct smb_passwd *pw_buf)
 {
 	struct passwd *pwfile;
+	fstring unix_username;
 	
 	if ( !sam_pass ) {
 		DEBUG(5,("build_sam_account: struct samu is NULL\n"));
@@ -1199,8 +1200,11 @@
 	}
 
 	/* verify the user account exists */
+
+	fstrcpy( unix_username, pw_buf->smb_name );
+	strlower_m( unix_username );
 			
-	if ( !(pwfile = getpwnam_alloc(NULL, pw_buf->smb_name)) ) {
+	if ( !(pwfile = getpwnam_alloc(NULL, unix_username )) ) {
 		DEBUG(0,("build_sam_account: smbpasswd database is corrupt!  username %s with uid "
 		"%u is not in unix passwd database!\n", pw_buf->smb_name, pw_buf->smb_userid));
 			return False;