I know nothing about how forums work so please forgive me if I say something stupid.
There is this plugin Similar thread checker that can be used by forums to check and warn the user if other threads with similar subjects already exists.
In other words, when someone is posting a new thread and type "Flashplayer 64" in the thread title, an instant search is executed and all available thread titles containing Flashplayer 64 words are displayed.
Hopefully he is finding the answer in one of those and there is no longer the need to start yet another one.
I suppose it could be useful for some of the questions that keep popping up here; playing mp3, DVD menus, updates etc...
I don't know if it's even compatible with our forum but maybe someone could take a look...or maybe find something equivalent?
http://community.mybb.com/thread-46032.html