I can't post links or images. My account is blocked because I have few too posts on my account. So I can't help you with any sort of screenshot or URLs unless you can tell me how to circumvent it. I have reproduced the problem in other browsers, so I'll just post up sample inputs that seem to break it.
These inputs have been tested in Chrome, Firefox and Internet Explorer 9 on Windows 7. Chrome is the only one that has any plugins whatsoever installed. The error is always the same: [h=2]vBulletin Message[/h] Could not determine latitude and logitude for specified address.
Sample Inputs (strings in "quotes", blanks are <blank>):
Searching for major cities using "Texas" as state seems to work okay...
Error?: NO!
City: "Dallas"
State/Province: "Texas"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: NO!
City: "Fort Worth"
State/Province: "Texas"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Using "TX" for state errors out...
Error?: YES
City: "Dallas"
State/Province: "TX"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: "Fort Worth"
State/Province: "TX"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
My zip code doesn't work...
Error?: YES
City: <blank>
State/Province: <blank>
Zip/Postal Code: "76040"
Country: <blank>
Within: 25
Error URL: Postblocked
Downtown Dallas or Fort Worth zips don't work either.
Error?: YES
City: <blank>
State/Province: <blank>
Zip/Postal Code: "75039"
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: <blank>
State/Province: <blank>
Zip/Postal Code: "76107"
Country: <blank>
Within: 25
Error URL: Postblocked
Midcities don't work at all...
Error?: YES
City: "Euless"
State/Province: "Texas"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: "Arlington"
State/Province: "Texas"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: "Irving"
State/Province: "Texas"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: "Grapevine"
State/Province: "Texas"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: "Euless"
State/Province: "TX"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: "Arlington"
State/Province: "TX"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: "Irving"
State/Province: "TX"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: YES
City: "Grapevine"
State/Province: "TX"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Oddly enough, Plano seems to work using "TX" but not with "Texas".
Error?: YES
City: "Plano"
State/Province: "Texas"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked
Error?: No!
City: "Plano"
State/Province: "TX"
Zip/Postal Code: <blank>
Country: <blank>
Within: 25
Error URL: Postblocked