ipv6 and ipv4 iptables ipset match rules - fail with 1.4.20-2 - work with 1.4.19-1 32bit userspace on 64bit amd64 kernel Not quite the same as #690548, as this is x86 and newer kernel, and the key is the version of iptables/libxtables10. I can switch between 1.4.19-1 (works) and 1.4.20-2 (fails) repeatedly, and get the same results every time. dmesg message: x_tables: ip_tables: set.3 match: invalid size 48 (kernel) != (user) 32 thanks, sdb