Ananova's run a story on the possible splitting of the house:
Big Brother house may still be split into two
The Big Brother house may be split into two separate areas after all.
'A Big Brother spokeswoman says pictures of the house split into two which have appeared on the internet are related to a possible task for the housemates.
But she said there had been no decision whether the metal and glass bars running through the middle of the house will ever be used.
One picture shows the pool separated from another part of the garden, while another shows one area of the dining room with comfortable seats and the other with wooden blocks.'
I think the gist of the task is that the people who pass it get to live in the 'nice' side and those who fail are sent to the 'bad' side, complete with outside loo which hasn't been revealed yet.
Expect the Unexpected!