No. This is very strange, the Chrome JS console stays clear, I type anything and nothing happen.
Today I tried with Chrome5 for Windows. Before I used Chrome5 for Linux. Both have the same behaviour, nothing happens when typing into suggestionbox. IE7/8 and Firefox3/3.5/3.6 (Windows/Linux) work fine.
could you please check log from a4j:log?
I put a a4j:log in (and after out) my form, but none messages occur.
I made another test creating a simple suggestionbox in another new form/a4j:region.
When I did this, both suggestionbox worked in Chrome. I don't know when this occurs.
If I delete the new form/region, the old suggestionbox really don't do anything.
Other side effect in Chrome is that when I load any JSF page of my system, the rich:dropDownMenu freezes, but the buttons for actions work fine.