Hi
I'm facing the same issue.
If you enable the debug mode for the list you will see seblod is performing the query (granted you entered 'token' ) :
t1.title LIKE '%token%' OR t1.introtext REGEXP "(::introtext::).*token.*(::/introtext::)"
in PHPmyadmin if you try the SQL query
SELECT * FROM `xxxx_content` WHERE introtext REGEXP "(::introtext::).*token.*(::/introtext::)"
you will be surprised it returns LESS results than
SELECT * FROM `xxxx_content` WHERE introtext LIKE "%token%"
Shouldn't be .... but this is what's happening ....
Cyril