Most web pages have icons that show up to the left of the URL in the address bar, these are often called favicons. For some reason, these sometimes won't show up for a particular site. This may be becuase the website hasn't specified one, in which case you are out of luck. But I've had some websites where the favicon just stops showing up for some unknown reason. When this happens, here's a trick that can help bring back the favicon.

Go to the address bar in the browser where the URL is shown: http:// www.somedomain.com/somepage.html (it obviously won't really say somedomain, and somepage, these just stand in for the real domains and pages) and manually edit the URL like so: http:// www.somedomain.com/favicon.ico. If the website has a favicon defined in the root directory, you'll see it shown on the web page and it will then start showing up in the address bar. If they don't have one defined, or it exists somewhere else you'll probably get some sort of error page which means this trick won't work for that site.