Steps to reproduce:
- Deploy the Alloy Showcase and navigate to the autoComplete "Instant Ajax".
- Type "co" into the input text box.
- Verify that the "Compatible" option is visible and selected.
- Press the down arrow key so that no option is selected.
- Press Enter.
If the bug still exists, a full page form submission (non-Ajax) will occur.
If the bug is fixed, an Ajax form submission will occur.