Q: What' behind Qihoo 360' squabbles with rivals in the past year?

A: Qihoo 360 Technology Co.'s highly-anticipated IPO on the New York Stock Exchange in March totaled US$ 176 million. Shares in the leading anti-virus software company more than doubled to US$ 34 soon after the public debut. But beyond the market buzz, Qihoo has also come under a harsh light after major competitors accused the company of unethical business practices last fall.