Live search does not implement search properties
With #26829 new TCA properties were added to improve the efficiency of the backend search. However these properties were not applied to the live search, hence both searches produce different results, which is not the expected behavior.
Furthermore the live search must load the full TCA of any table it searches in (as necessary) in order to be able to find anything at all for tables for which the full TCA is not yet loaded (see #31760).
Updated by Stefan Neufeind almost 12 years ago
I think this is related to what I experience with 4.6.3 (and tt_news 3.1.0). We added
$TCA['tt_news']['ctrl']['searchFields'] = 'title';
to typo3conf/extTables.php and from there on it was possible to search inside the titles of a news-entry using the search-functionality below a page. (Using the introduction-package you may search for "t3uxw".)
However the live search/quick search still doesn't contain those tt_news-entries.
Funny enough: When clicking the "Show all"-button below the live-search you get them ... since then the normal search-functionality is used.