Update: In December 2012 he did 305kg in training.
Easy 270kg & 280kg Bench Press to secure gold. No problem here.
But his world record attempt at 301kg was red lighted.
If you know why, let me know in the comments.
Update: So the consensus seems to be that it was the uneven lock out.
From the official rule book (PDF):
h) Any uneven extension of both arms during the final ‘lock out’ stage.
Thanks to Sascha for submitting the video.