google 自动查168 duffer2005-08-10 05:59:00

I use firefox and normally I open up several browser windows, google is my home page, I found out in recent days, if I have one window with www.google.com loaded, surfing in another window for a while and that google window shows search "168" result.(like you type 168 in google search bar, click search),

is this some kind of trojan? virus? My IE seems fine.

thanks