I PM'ed already to Vektrath about a serious virus problem within these forums. My browser protection software recognized a php script coming from
http://directagain.net/in.phpusing different php parameters as malware 'HTML/IFrame.apo' . I heard from others it opens popups.
I didn't find out how browsers can be set to reject this and similar files from certain web sites. At the moment my browser protection is set to "Automatically deny access" to recognized malware files.
If you get such popups, review and / or update your virus software so it recognizes those scripts to prevent more damage to your PC.