Thread:Extension talk:Lucene-search/Missing exact match results

I'm using Lucene-search on a local copy of Wikipedia and the search results are missing *some* exact matches. For example, a search for 'Melbourne' does not turn up the city Melbourne (which is the top result on Wikipedia). However, other search terms have multiple exact match results. For example, a search for 'Australia' turns up the page for 'Australia' three times. I built the lucene indexes without any errors (over quite a few days) and the Melbourne page is present in the Mysql database. I'm using lucene-search-2.1.3. Any pointers much appreciated.