Recently, but not every time, when I open safari after the computer started, the first page (not the home page I set) has been a strange page which I never have seen before. The problem is, why the strange page can open in safari? Is that a virus? or a Trojan horse？ Until now, there are not any strange thing happened in other application, and in system. The strange page come out today is:http:://www.youdraw.cn (For some unknown safety reason, I edit the page address by add another ":") (the system version : 10.5.5, safari version:3.2.1, PPC.) Thank you.