My yahoo search engine ,as well as some other sites, is redirecting every time to some smaller search engines. The screen goes blank and a small button appears in the upper left of the page that says "continue". What has infiltrated my Mac? I have run MacScan but it comes up clean. Not a proven software however. No other scans exist for mac. Can i find these files manually? Where do they exist? Some addn'l information: Safari2.0.2/MacOSX10.4.3 on a Powerbook G5...............We must not let the machines win!!!