Do AOL browsers cause problems?

Hello. We have a search routine that seems to be having problems when accessed by an AOL browser. Using one causes occasional non selective results while ie5 never fails to produce the correct criteria. I can't imagine how that might happen but can anyone tell me if this is a known problem? If so, what has been done to overcome it? The site that's having the problem is http://www.wnychildcare.com/parents/locateaprovider/locateaprovider.php3 Many thanks. Floyd Baker --