economy - The revaluation rumor machine

New rumors in the market suggest yet again an imminent revaluation of the Renminbi. Now, that is nothing new, since these rumors are around already for a few years and get last year 50 bn USD worth of Renminbi to return to China in vain, as the revaluation did not materialize.
Some rumors suggest that Chinese banks give people a harder time in changing US dollars into Renminbi, a barriers that goes beyond the recently announced limitation for non-residents to change no more than USD 10,000 per day. Any more stories?