Autocomplete UI: Can't make same query twice in a row

For reference, use your demo implementation here: http://docs.jquery.com/UI/Autocomplete

1. Type in 'j' - note the two options: Java and Javascript

2. Select either one

3. Erase the input field, then type 'j' again - note that the dropdown does not trigger again. To get it to trigger, you must hit the down arrow key.

You can't get more suggestions that begin with 'j' until you make a query for something that starts with another letter.

I think this is a bug. The dropdown should trigger based on whatever the user is typing even if he has selected and erased something before.