Basically, Shamrock talked about how much White has changed since becoming successful, while White talked about how much money Shamrock owes him.
Shamrock also asked why White seems to hate he and his brother (Frank Shamrock, another former UFC champion and MMA pioneer) so much. He also brought up White's hatred for other MMA legends such as Tito Ortiz, Quinton "Rampage" Jackson and Randy Couture.
The entire beef with White and Shamrock stems from a lawsuit Ken filed against the UFC president years ago. Gas was thrown on the fire recently when Shamrock, along with the aforementioned MMA legends announced that they will be "crashing" an upcoming UFC event.