Hello Dave,
Did you use this function with selenium object?
Currently I have the same issue on the same environment.
In Selenuim IDE I've used this function and all works fine. I've converted my test to Java code, just to use it with testNG, and found that selenium object has no such function.
May be you know how to send 'Enter' key to GWT SuggestBox?
I've tried a lot of examples from the Internet but without success.
BTW, For our purpose we are using not GWT SuggestBox, but our custom control that based on SuggestBox.
Thanks,
Mike