--- eglibc-2.16.orig/nscd/nscd.conf
+++ eglibc-2.16/nscd/nscd.conf
@@ -80,7 +80,9 @@
 	shared			services	yes
 	max-db-size		services	33554432
 
-	enable-cache		netgroup	yes
+# netgroup caching is known-broken, so disable it in the default config,
+# see: https://bugs.launchpad.net/ubuntu/+source/eglibc/+bug/1068889
+	enable-cache		netgroup	no
 	positive-time-to-live	netgroup	28800
 	negative-time-to-live	netgroup	20
 	suggested-size		netgroup	211