Hi,
Just downloaded b7 and was playing LAN (connected via computer name lookup to host, using UPnP to forward ports, yes, allowed WarZone for both host and client WinDOwS 7 x64 firewall).
Crashlogs here:
Host:
http://dl.dropbox.com/u/52352268/hostlogs.7z
Client:
http://dl.dropbox.com/u/52352268/clientlogs.7z
Compressed with 7-zip (any recent version of Winzip/WinRAR should be able to open them).
Thanks,
jr2
EDIT: Sorry, just added this as a comment to bug 3351