ABC Online: (The Australian one, not the Desperate Housewives one)

"Claims London Olympics logo ad causing epileptic fits

The widely ridiculed new logo for the 2012 London Olympics has become the centre of another controversy.
Animation for the logo has been dropped after complaints that it had caused some viewers to suffer epileptic fits.
The short animated sequence of a diver plunging into a pool contains rapid flashes of colour.
One man says he blanked out after seeing the advertisement on tv."

Shocking.