Chinese security company Rising said Googles Pinyin Input Method Editor (IME) presented a serious security threat to Microsoft Windows Vista users. The company warned users not to download and install the software, saying hackers could exploit a flaw. Early versions of the software bore a striking resemblance to Chinese Internet company Sohu.com. Google acknowledged on Sunday that a “non-Google database” had been used to develop its IME software, but stopped short of saying where the database came from.”]