Update: It looks like they got their wish... they will be getting $1 million per episode. 

According to The Hollywood Reporter, it seems that continuation of production for The Big Bang Theory's eighth season was put on hold due to some contract concerns.

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It was said that Jim Parsons (Sheldon), Haley Cuoco (Penny), and Johnny Galecki (Leonard) are requesting up to $1 million per episode, compared to their current $325,000. They were also said to be requesting a cut of the back-end profits.

Find the full article here.

Looks like they're pulling a "Friends" !