Hi,
removed all DNS entries and Firefox still could not find the site.

Rebooted

Checked the dns tab, the entries that were in the resolve.conf appear to have been added into the DNS tab by the system. Firefox could still not access a named site.

Chris@DadsSolaris#nslookup google.com
Server: 192.168.0.1
Address: 192.168.0.1#53

Non-Authoritative answer:
Name: google.com
Address: 74.125.45.100
Name: google.com
Address 74.125.67.100
Name: google.com
Address: 74.125.127.100

Removed DNS Entries and retried
Chris@DadsSolaris#nslookup google.com
;; connection timed out; no servers could be reached

Rebooted PC
This time the DNS addresses were not automatically added and nslookup failed.
Added 192.168.0.1 and got the following result

Chris@DadsSolaris#nslookup google.com
Server: 192.168.0.1
Address: 192.168.0.1#53

Non-Authoritative answer:
Name: google.com
Address: 74.125.45.100
Name: google.com
Address 74.125.67.100
Name: google.com
Address: 74.125.127.100

Replaced 192.168.0.1 in the DNS Tab with 202.27.158.40 and received the following result:
Chris@DadsSolaris#nslookup google.com
Server: 202.27.158.40
Address: 202.27.158.40#53

Non-Authoritative answer:
Name: google.com
Address: 74.125.45.100
Name: google.com
Address 74.125.67.100
Name: google.com
Address: 74.125.127.100

These results to me show that there is nothing wrong with the DNS system (or is there) and could be a firefox problem.

Firefox->edit->preference->Network->Settings
No Proxy

Restart Firefox
Browse to Google
Firefox can't find the server at Google

Restart Firefox
Browse to 74.125.45.100
Firefox successfully returns Google (does not resolve name)

Firefox->edit->preference->Network->Settings
Auto-detect Proxy settings for this network

Restart Firefox
Browse to Google
Firefox can't find the server at Google

Restart Firefox
Browse to 74.125.45.100
Firefox successfully returns Google (does not resolve name)

Summary:
DNS just ain't working like it should be.

But I hope we are getting closer to a resolution