diff -r 52d651b3b98f -r 01f6312a4a7b libpurple/protocols/msn/notification.c
--- a/libpurple/protocols/msn/notification.c	Tue Oct 18 04:47:58 2011 +0000
+++ b/libpurple/protocols/msn/notification.c	Tue Oct 18 18:47:48 2011 +0000
@@ -1193,7 +1193,7 @@
 	if (id && strcmp(id, "1")) {
 		PurpleConversation *conv
 			= purple_find_conversation_with_account(PURPLE_CONV_TYPE_ANY,
-			                                        who, gc->account);
+			                                        who, purple_connection_get_account(gc));
 		if (conv != NULL) {
 			const char *error;
 			if (!strcmp(id, "407"))