What I have:
1. Mysql 4.1.11 on local computer, Mysql 4.0.24 on my server
2. Identical /etc/my.cnf on both computers (except paths of course)
3. Identical databases on both computers

When I perform fulltext search in a way like folowing:

select * from program 
where match (name, keywords, description) 
against ('+3gp* +converter*' in boolean mode)

the result on local machine is quite different from the result on server - server version does not include some records. Cannot understand why. I suppose that fulltext indexing in 4.0 and 4.1 cannot be so much different. Will greatly appreciate any advice.

Also I'm a little bit confused because PhpMyAdmin on local computer says that cardinality for fulltext index is 1 and on server it is 21631 - the number of rows in a table.

The problem is found. Some days ago I changed keywords column for some records and then insert occured before I did optimize table. Now I dumped this table with --add-drop-table option and reloaded it again, so everything works fine now.