I've "broken" the vB search - and need help

[MacMorag]

I have a very hacked vB3.0.7 board. Somewhere along the way I have broken the search.

e.g. I create a new thread (or post). If I then subsequently search for a very specific word which is contained in the thread (or post), nothing is returned by the search. So either a/ the words aren't being written to the search index when the thread/post is created, or b/ the search function is not correctly querying the search index.

I have tried emptying/rebuilding the search index, then doing the same search. This time it will always work, so I'm sure the problem is that the words aren't being written to the search index when the thread/post is created.

I've had a look at newthread.php and newreply.php and can't see any hacks there.

Is there any other file which I may have hacked which can cause this problem?

Thanks for any pointers.