diff -r fd6e676248f8 -r d09a1b6dc386 libpurple/protocols/msn/slplink.c
--- a/libpurple/protocols/msn/slplink.c	Mon May 09 22:56:29 2011 +0000
+++ b/libpurple/protocols/msn/slplink.c	Tue May 10 03:09:47 2011 +0000
@@ -344,7 +344,7 @@
 		if (slpmsg->slpcall->progress_cb != NULL)
 		{
 			slpmsg->slpcall->progress_cb(slpmsg->slpcall, slpmsg->size,
-										 len, offset);
+										 len);
 		}
 	}
 
@@ -561,7 +561,6 @@
 {
 	MsnSlpMessage *slpmsg;
 	MsnP2PInfo *info;
-	guint64 offset;
 
 	info = part->info;
 
@@ -574,9 +573,7 @@
 		return;
 	}
 
-	offset = msn_p2p_info_get_offset(info);
-
-	if (offset == 0)
+	if (msn_p2p_info_is_first(info))
 		slpmsg = init_first_msg(slplink, info);
 	else {
 		guint32 session_id, id;
@@ -600,7 +597,7 @@
 		if (slpmsg->slpcall->progress_cb != NULL)
 		{
 			slpmsg->slpcall->progress_cb(slpmsg->slpcall, slpmsg->size,
-										 part->size, offset);
+										 part->size);
 		}
 	}