It has been reported that the delay of the 5th round was caused by light failures and bad lighting near the players boards. After multiple attempts to fix the problems the players were asked if they would play with the awkward lighting and they agreed.

http://english.people.com.cn/90001/90779/6265790.html

You would think with such a prestigious event that the organizers would have problems such as these fixed. Strange stuff...

As long as their are no bathroom controversies...

--Fromper