According to Computerandvideogames.com

The article stated:

"Imagine our surprise when we were toldthat the game had failed epilepsy tests and has to be re-engineered asa result before it can be released to the public.

CVG hasbeen told that WipEout "fails the epilepsy tests so much that it has tobe re-engineered." All that speed and flashing lights zipping past youreyes must be too much to handle.

No further details wereavailable, such as how long this re-working might take but we'vecontacted Sony and are still awaiting an official response on thestatus of WipEout HD and when we can expect to see it launch on PSN. "

Bright flashing lights and wicked soundtracks...it's like going to a techno rave only with slight seisures.