Are 1.4.0 search problems fixed in more-recent versions?

eg, On my 1.4.0 site, a search for "release" several title matches...except for the title of "Release_1.0_spec", possibly the most-important wiki page on my system.

I've been through a thread before with this, and maybe there are several things that one can go off and check and fix. I just wonder: is it possible to make this search "bulletproof" such that one does not have to "check and fix" things in the background database?

My system: Apache 2.0.52 php 4.3.9 mysql 4.0.21 MW 1.4.0

-Matt