diff -urdpNX /usr/share/dontdiff -x debian dovecot-1.0-test52.vanilla/src/auth/mech-ntlm.c dovecot-1.0-test52/src/auth/mech-ntlm.c
--- dovecot-1.0-test52.vanilla/src/auth/mech-ntlm.c	2004-11-07 13:41:25.000000000 +0300
+++ dovecot-1.0-test52/src/auth/mech-ntlm.c	2004-11-14 00:07:03.000000000 +0300
@@ -203,12 +208,14 @@ mech_ntlm_auth_continue(struct auth_requ
 }
 
 static void
-mech_ntlm_auth_initial(struct auth_request *auth_request,
-		       const unsigned char *data __attr_unused__,
-		       size_t data_size __attr_unused__,
+mech_ntlm_auth_initial(struct auth_request *request,
+		       const unsigned char *data, size_t data_size,
 		       mech_callback_t *callback)
 {
-	callback(auth_request, AUTH_CLIENT_RESULT_CONTINUE, NULL, 0);
+	if (data_size == 0)
+		callback(request, AUTH_CLIENT_RESULT_CONTINUE, NULL, 0);
+	else
+		mech_ntlm_auth_continue(request, data, data_size, callback);
 }
 
 static void
diff -urdpNX /usr/share/dontdiff -x debian dovecot-1.0-test52.vanilla/src/auth/mech-rpa.c dovecot-1.0-test52/src/auth/mech-rpa.c
--- dovecot-1.0-test52.vanilla/src/auth/mech-rpa.c	2004-11-07 13:41:25.000000000 +0300
+++ dovecot-1.0-test52/src/auth/mech-rpa.c	2004-11-14 00:07:09.000000000 +0300
@@ -541,12 +541,14 @@ mech_rpa_auth_continue(struct auth_reque
 }
 
 static void
-mech_rpa_auth_initial(struct auth_request *auth_request,
-		      const unsigned char *data __attr_unused__,
-		      size_t data_size __attr_unused__,
+mech_rpa_auth_initial(struct auth_request *request,
+		      const unsigned char *data, size_t data_size,
 		      mech_callback_t *callback)
 {
-	callback(auth_request, AUTH_CLIENT_RESULT_CONTINUE, NULL, 0);
+	if (data_size == 0)
+		callback(request, AUTH_CLIENT_RESULT_CONTINUE, NULL, 0);
+	else
+		mech_rpa_auth_continue(request, data, data_size, callback);
 }
 
 static void