Semi-functional networking?

I'm not ready to call it a bug, but I do need advice...

My NIC is configured by DCHP, I can then ping my router (192.168.64.1),
my ISP's DNS servers, and an internal server.  I can SSH to the internal
server. But the instant I attempt to HTTP anywhere, I never get
replies.  I've sniffed the traffic in LNX-BBC, but couldn't find a
problem (although, I'm not the best protocol analyst).

My entire network is NAT'd to the outside world and all works fine.  I
just seem to be missing something with LNX-BBC

--S