I did a binary upgrade to latest snapshot and followed -current. I've seen huge improvement on server-client performance on the msk0 (internal side) but packet forwarding didn't change at all.
4.6-release: server max in: 300Mbps server max out: 760Mbps forwarding max: 400 Mbps 4.7-current server max in: 800Mbps (almost 3 times up) server max out: 650Mbps (this went down) forwarding max: 400Mbps (same) The errors on the msk0 also gone away. I guess the external NIC (re0) is having the problem now. It's a )$#$&%!! realtec. I'll try the DLINKs and report. Giannis