I've already started this functionality in T2.x, but I'm going to finish it and ready it up for some unit testing etc today; I still don't have a T3 repo setup in my environment because I'm to busy. But once I get the search running smoothly I'll attach the model/view/controller in a zip to here, and then work it into a T3 build later on.
Woah! I didnt even know that interface existed!! It was a whole new view with its own tab etc. To bad i didnt check this earlier I almost have the entire thing finished for 2.x; I guess i'll scrape this interface it and you can close as invalid or something.
What does this search feature include that is different to the "summary":http://traq.traqproject.org/traq/tickets?summary=Search and "description":http://traq.traqproject.org/traq/tickets?description=search filters?