Kotaku is reporting that the PAL version of GTA IV for the Xbox 360 may have been leaked:
At around 11:50am Greenwich Mean Time, the PAL version
of Grand Theft Auto IV for the Xbox 360 was ripped and leaked to
various torrent sites by a [group] called iCON…
YouTube clips have been popping up online of the game’s
opening and early missions — but as of posting, many of the clips have
been taken down. The retail release is a mere six days away. This isn’t
the first GTA game leaked as San Andreas was as well. And it was leaked
a week before, too.