Bollywood superstar Amitabh Bachchan is upset over the malfunctioning of social networking sites Twitter and Tumblr and has threatened to quit the two if the authorities didn't rectify the situation.

Apparently, a number of his fans and followers had been facing problems commenting on his blog and Twitter account. Naturally, the veteran actor was very upset after reading the comments on the malfunction, warning Twitter that if the problem does not sorted out he might go elsewhere.