diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index f61eb2e..3d4c5d2 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -764,8 +764,11 @@ static int br_ip4_multicast_add_group(struct net_bridge *br,
 {
 	struct br_ip br_group;
 
-	if (ipv4_is_local_multicast(group))
+printk("+++ br_ip4_multicast_add_group() %s %pI4\n", port->dev->name, &group);
+	if (ipv4_is_local_multicast(group)) {
+printk("+++ br_ip4_multicast_add_group() %s %pI4, is link local\n", port->dev->name, &group);
 		return 0;
+	}
 
 	br_group.u.ip4 = group;
 	br_group.proto = htons(ETH_P_IP);
@@ -780,8 +783,11 @@ static int br_ip6_multicast_add_group(struct net_bridge *br,
 {
 	struct br_ip br_group;
 
-	if (!ipv6_is_transient_multicast(group))
+printk("+++ br_ip6_multicast_add_group() %s %pI6\n", port->dev->name, group);
+	if (!ipv6_is_transient_multicast(group)) {
+printk("+++ br_ip6_multicast_add_group() %s %pI6, is not transient\n", port->dev->name, group);
 		return 0;
+	}
 
 	ipv6_addr_copy(&br_group.u.ip6, group);
 	br_group.proto = htons(ETH_P_IPV6);
@@ -1001,6 +1007,7 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br,
 	int num;
 	int err = 0;
 
+printk("+++ br_ip6_multicast_mld2_report()\n");
 	if (!pskb_may_pull(skb, sizeof(*icmp6h)))
 		return -EINVAL;
 
@@ -1386,11 +1393,14 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
 	if (skb->len < len || len < ip_hdrlen(skb))
 		return -EINVAL;
 
+printk("+++ br_multicast_ipv4_rcv() skb2->len: %i len: %i skb->len: %i\n", skb2->len, len, skb->len);
 	if (skb->len > len) {
+printk("+++ br_multicast_ipv4_rcv() doing clone\n");
 		skb2 = skb_clone(skb, GFP_ATOMIC);
 		if (!skb2)
 			return -ENOMEM;
 
+printk("+++ br_multicast_ipv4_rcv() and pskb_trim_rcsum\n");
 		err = pskb_trim_rcsum(skb2, len);
 		if (err)
 			goto err_out;
@@ -1405,14 +1415,20 @@ static int br_multicast_ipv4_rcv(struct net_bridge *br,
 	if (!pskb_may_pull(skb2, sizeof(*ih)))
 		goto out;
 
+printk("+++ br_multicast_ipv4_rcv() 2) skb2->len: %i len: %i skb->len: %i\n", skb2->len, len, skb->len);
 	switch (skb2->ip_summed) {
 	case CHECKSUM_COMPLETE:
+printk("+++ br_multicast_ipv4_rcv() here 1.6\n");
 		if (!csum_fold(skb2->csum))
 			break;
 		/* fall through */
 	case CHECKSUM_NONE:
+printk("+++ br_multicast_ipv4_rcv() here 1.7, skb2->csum is %x\n", skb2->csum);
+		__sum16 foobar;
 		skb2->csum = 0;
-		if (skb_checksum_complete(skb2))
+		foobar = skb_checksum_complete(skb2);
+printk("+++ br_multicast_ipv4_rcv() here 1.8, skb_checksum_complete: %x\n", foobar);
+		if (foobar)
 			goto out;
 	}
 
@@ -1459,6 +1475,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
 	int offset;
 	int err;
 
+printk("+++ br_multicast_ipv6_rcv()\n");
 	if (!pskb_may_pull(skb, sizeof(*ip6h)))
 		return -EINVAL;
 
@@ -1476,6 +1493,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
 		return 0;
 
 	len = ntohs(ip6h->payload_len);
+//	len = ntohs(ip6h->payload_len) + sizeof(*ip6h); <- should probably be this?
 	if (skb->len < len)
 		return -EINVAL;
 
@@ -1485,6 +1503,7 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
 	if (offset < 0 || nexthdr != IPPROTO_ICMPV6)
 		return 0;
 
+printk("+++ br_multicast_ipv6_rcv() here 0.5\n");
 	/* Okay, we found ICMPv6 header */
 	skb2 = skb_clone(skb, GFP_ATOMIC);
 	if (!skb2)
@@ -1494,7 +1513,9 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
 	if (!pskb_may_pull(skb2, offset + sizeof(struct icmp6hdr)))
 		goto out;
 
+printk("+++ br_multicast_ipv6_rcv() len: %i, offset: %i, skb_network_offset(skb2): %i\n", len, offset, skb_network_offset(skb2));
 	len -= offset - skb_network_offset(skb2);
+printk("+++ br_multicast_ipv6_rcv() new len: %i\n", len);
 
 	__skb_pull(skb2, offset);
 	skb_reset_transport_header(skb2);
@@ -1513,27 +1534,37 @@ static int br_multicast_ipv6_rcv(struct net_bridge *br,
 	}
 
 	/* Okay, we found MLD message. Check further. */
+printk("+++ br_multicast_ipv6_rcv() skb2->len: %i len: %i skb->len: %i\n", skb2->len, len, skb->len);
 	if (skb2->len > len) {
+printk("+++ br_multicast_ipv6_rcv() doing pskb_trim_rcsum\n");
 		err = pskb_trim_rcsum(skb2, len);
 		if (err)
 			goto out;
 	}
 
+printk("+++ br_multicast_ipv6_rcv() here 1.5\n");
 	switch (skb2->ip_summed) {
 	case CHECKSUM_COMPLETE:
+printk("+++ br_multicast_ipv6_rcv() here 1.6\n");
 		if (!csum_fold(skb2->csum))
 			break;
 		/*FALLTHROUGH*/
 	case CHECKSUM_NONE:
+printk("+++ br_multicast_ipv6_rcv() here 1.7, skb2->csum is %x\n", skb2->csum);
+		__sum16 foobar;
 		skb2->csum = 0;
-		if (skb_checksum_complete(skb2))
+		foobar = skb_checksum_complete(skb2);
+		if (foobar) {
+printk("+++ br_multicast_ipv6_rcv() here 1.8, skb_checksum_complete(skb2): %x (skb): %x\n", foobar, skb_checksum_complete(skb));
 			goto out;
+		}
 	}
 
 	err = 0;
 
 	BR_INPUT_SKB_CB(skb)->igmp = 1;
 
+printk("+++ br_multicast_ipv6_rcv() here 2\n");
 	switch (icmp6h->icmp6_type) {
 	case ICMPV6_MGM_REPORT:
 	    {