In order to reproduce the issue,
1. Go to http://www.chevronlubricants.com/
2. Select United states as your country, and click "Go" button.
3. Click on "Select a Country" link at the the top right hand corner
4. You will go back to /welcome.aspx where the Combobox remembers the "United States" setting. Without changing anything in the combobox, click "Go" button.
5. You will see the issue, which is that instead of posting back correctly, it just refreshes the page and loses the "United States" setting.
There is a requiredfieldvalidator on the combobox, which appears to work correctly, except this weird postback issue when coming to the /welcome.aspx for a second time
1. Go to http://www.chevronlubricants.com/
2. Select United states as your country, and click "Go" button.
3. Click on "Select a Country" link at the the top right hand corner
4. You will go back to /welcome.aspx where the Combobox remembers the "United States" setting. Without changing anything in the combobox, click "Go" button.
5. You will see the issue, which is that instead of posting back correctly, it just refreshes the page and loses the "United States" setting.
There is a requiredfieldvalidator on the combobox, which appears to work correctly, except this weird postback issue when coming to the /welcome.aspx for a second time