I'm getting this traceback from 2.6.15-rc5. - no skge driver in this box - 02:01.0 Ethernet controller: Intel Corporation 82547EI Gigabit Ethernet Controller (LOM) - 03:01.0 Ethernet controller: 3Com Corporation 3c905 100BaseTX [Boomerang] - 03:04.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78) - just seems to be ping that causes it - the checksums look ok with tethereal tunnel0: hw csum failure. [<c03733cf>] __skb_checksum_complete+0x67/0x6d [<c03cd50f>] icmp_error+0xbb/0x1c1 [<c03d36ce>] ipt_do_table+0x2f2/0x4f0 [<c03718dc>] skb_checksum+0x4e/0x2c2 [<c03ca33c>] ip_conntrack_in+0x117/0x395 [<c03d9f33>] ipt_hook+0x37/0x3c [<c03882cc>] nf_iterate+0x58/0xa8 [<c039177a>] ip_rcv_finish+0x0/0x2ba [<c0388387>] nf_hook_slow+0x6b/0x134 [<c039177a>] ip_rcv_finish+0x0/0x2ba [<c03913ba>] ip_rcv+0x1d0/0x590 [<c039177a>] ip_rcv_finish+0x0/0x2ba [<c03763ba>] netif_receive_skb+0x1d0/0x23e [<c03764aa>] process_backlog+0x82/0x109 [<c03765c0>] net_rx_action+0x8f/0x16a [<c0126517>] __do_softirq+0x6b/0xd8 [<c01265b6>] do_softirq+0x32/0x34 [<c0104ee2>] do_IRQ+0x1e/0x24 [<c0103756>] common_interrupt+0x1a/0x20 [<c0100d6c>] default_idle+0x2e/0x52 [<c0100e09>] cpu_idle+0x65/0x73 [<c055a945>] start_kernel+0x180/0x1bc [<c055a32a>] unknown_bootoption+0x0/0x1e0 -pee - : send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html