The search feature has been fixed, the problem being far smaller than ever before imagined. It turns out that failing to include method="post" in the <form> tag prevented large lists from being sent properly (most likely due to IE defaulting forms to HTTP GET, not POST). In any event, the problem is fixed. Sorry about that :\

As to the slow results: I have not experienced them. Even large searches for me take only fractions of a second. The search algorithm itself is rather fast since the engine rips through a bare-bones hash table and associates data only after the results are retrieved, thus eliminating the overhead created by associating data pre-search. If the problem continues please contact me directly.