I accessed a website through the Twitterific app, then tried through safari on my iPhone4, and got a pop up window saying: Warning! Your computer is at risk of malware attacks. We recommend you to check your system immediately. Press OK to start the process now... The only option is OK! I can't close safari, close my window or anything! I tried turning it to airplane mode and going to safari to change the pop up window, but got the same message. Eventually, I restarted the phone and it went away. Has anyone run into this before? I was unable to find any threads or advice when I googled it. Is it malware? I never had this happen on my old iPhone!