queries might break when filtering for containment

Using %%%s%% with LIKE in a query allows one to filter for containment - so does views. However I noted troubles searching for something that starts with 'b', 'd', 's', .. (see http://api.drupal.org/api/function/_db_query_callback/6).

So usually %s is replaced with the search string, %% with % so the db server correctly gets %input%. However when %s gets replaced and input is 'boo' there is %%boo%% and then I think %b gets replaced erroneously.