On my 3490 (modded 3760 with All Features Enabled) with 6.30 firmware and CNEUNT 2012.40 Address search looks like this:
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With every new tap on a letter (or number), new letters (or numbers) are now enabled or disabled.
With another map, Address search is different.
Postal Codes is not a feature of this map, so "Enter postal Code" it's disabled and not shown on the screen.
Smart filtering is also disabled with this map and as I continue to tap on letters, the list of available cities is shown on the screen.
I believe it has to do with the \.System\SID folder and CNxxNT maps.