diff --git a/common/utils.go b/common/utils.go
index 51129500..281699a6 100644
--- a/common/utils.go
+++ b/common/utils.go
@@ -130,10 +130,15 @@ func GetNetDevsWithPredicate(processID int, predicate func(link netlink.Link) bo
 	if err != nil {
 		return nil, fmt.Errorf("unable to open root namespace: %s", err)
 	}
+	defer nsToplevel.Close()
 	nsContainr, err := netns.GetFromPid(processID)
 	if err != nil {
+		if os.IsNotExist(err) {
+			return nil, nil
+		}
 		return nil, fmt.Errorf("unable to open process %d namespace: %s", processID, err)
 	}
+	defer nsContainr.Close()
 	if nsToplevel.Equal(nsContainr) {
 		return nil, nil
 	}
diff --git a/site/operational-guide/uniform-dynamic-cluster.md b/site/operational-guide/uniform-dynamic-cluster.md
index 8a73022f..df5f6742 100644
--- a/site/operational-guide/uniform-dynamic-cluster.md
+++ b/site/operational-guide/uniform-dynamic-cluster.md
@@ -46,14 +46,14 @@ Where
 On each new peer, at boot, via
 [systemd](/site/installing-weave/systemd.md):
 
-    hostN$ weave launch --no-restart --name ::N --ipam-seed $SEED $PEERS
+    hostN$ weave launch --no-restart --name ::N --ipalloc-init seed=$SEED $PEERS
 
 Where,
 
 * `--no-restart` disables the Docker restart policy, since this will be
   handled by systemd.
 * `--name` specifies a unique name for this new peer.
-* `--ipam-seed` specifies the names of only those peers that were
+* `--ipalloc-init seed` specifies the names of only those peers that were
   involved in the initial cluster bootstrap - even if they have been
   subsequently removed from the cluster. You can view this as a kind
   of 'cluster identity',where  peers may only interoperate in the same