After updating to bind-8.2.3 for RH 6.2, doing a nslookup gives me this:
*** Can't find server name for address 192.168.200.180: No response from server
When I back down to 8.2.2P7, everything works fine.
Check your /var/log/messages for named startup errors. I guess your zone file(s)
have incorrect SOA syntax and were rejected upon BIND startup.
Ahh! That was it. 8.2.3 is less forgiving on syntax errors! After I corrected the errors, everything is now fine.
Thanks for pointing me in the right direction.