I\'ve implemented autocomplete on an input field, but the box does not show up and firebug returns \"this.source is not a function\". I\'ve used autocomplete on other fields
If you were trying to use autocomplete from http://www.devbridge.com/projects/autocomplete/jquery/#demo, it now collides with the autocomplete method in jQuery UI. I had the same problem and later noticed that I could just use the jQuery UI implementation.
(NOTE: It appears that this page's documentation is wrong: http://docs.jquery.com/Plugins/Autocomplete#Setup)