diff -ur linphone-3.2.1/coreapi/exevents.c linphone-3.2.1+info/coreapi/exevents.c
--- linphone-3.2.1/coreapi/exevents.c	2009-09-25 08:30:55.000000000 +0100
+++ linphone-3.2.1+info/coreapi/exevents.c	2009-10-29 12:32:19.000000000 +0000
@@ -926,7 +926,15 @@
 					linphone_process_media_control_xml(lc,ev);
 				else if (strcmp(ct->subtype,"dtmf-relay")==0)
 					linphone_process_dtmf_relay(lc,ev);
-				else ms_message("Unhandled SIP INFO.");
+				else ms_warning("Unhandled SIP INFO.");
+			}
+			else
+			{
+				osip_message_t *ans=NULL;
+				eXosip_call_build_answer(ev->tid,200,&ans);
+                		if (ans)
+                        		eXosip_call_send_answer(ev->tid,200,ans);
+				ms_warning("No valid ct or subtype");
 			}
 		}
 	}else ms_warning("linphone_call_message_new: No request ?");