v5.9 build 1904,
When the Yes/No attribute's (IsDeleted) value in the database (MySQL 5.5) is 'null' then the query Query rule to display products is:
FIND Products WHERE Object.IsDeleted<>'Yes'
is not executing properly and not showing any query results.
Since both null and 0 values <> 1 or Yes (1 as stored in the DB) the query should list the products.
BSV emailed.
Cheers