This has been happening for awhile. I thought it was related to the network port changes, but it happens with the live patch today. It will randomly stop updating in a zone I've been in for awhile and just shows this in the console:

Code:
Debug: PCAP Filter Set: udp[0:2] > 1024 and udp[2:2] > 1024 and ether proto 0x0800 and host 10.7.2.87 and not broadcast and not multicast
Info: EQPacket: SessionDisconnect detected, awaiting next zone session,  pcap filter: EQ Client 10.7.2.87
Any ideas?

EDIT: Also see this when zoning into a zone with the update today:

Code:
Warning: OP_ZoneEntry  (0xfa7) (dataLen: 92) doesn't match: sizeof(ClientZoneEntryStruct):88