It looks like you are trying to access a link that no longer exists on this site.
If you tried to visit a link that has a "~" in the path like this:
http://www.cs.uga.edu/~pagename then manually change the URL in your browser bar to http://cobweb.cs.uga.edu/~pagename
For example: if you were trying to access http://www.cs.uga.edu/~laks or http://computing.uga.edu/~laks, instead go to http://cobweb.cs.uga.edu/~laks