Previously I where using 'jQuery Autocomplete plugin 1.1' there were some issues in IE with the auto fill so I migrated to 'jQuery UI 1.8.16'. Issues were resolved in this but there seems to be some other usability problems.
Lets say when some one types some characters in input area suggests are provided but the first result in it is not selected by default.
Navigating the suggestions using arrow key, When I go beyond the last suggestion it supposed to go to the beginning right but it didn't happens. I believe it should be cyclic manner.