Domain Name Resolution

Greetings,

I have a domain name registered at Yahoo. I have changed the "A Record" to point to my dedicated IP address at Linode.

When I navigate to my Domain Name via web browser, it resolves to the correct IP address, but the value in the browser's address bar changes to the IP address instead of the Domain Name (which I entered originally).

Is this an Apache issue or a DNS issue or something else entirely?

Thanks,

Sean