Referring the OP to a link elesewhere in your Forum, especially when you know full well that that link provides absolutely NO INFORMATION from the illustrious Sony Corporation, is treating that customer with absolute contempt. It is nothing more than the equivalent paper shuffling on a typical bureaucrats desk - much easier for the bureacrat because he does not actually have to put himself out or actually do anything!!
Much better would be to try and provide an honest answer to the customer - even if that answer is not a definitive answer. The attitude here of just referring the OP to a meaningless thread which does no more than let him know "he is not alone" whilst Sony seems to smugly think action has solved yet another "customer service" issue speaks volumes about the company (and perhaps this contempt of customers helps explain the corporate financial issues faced by Sony!!!!).
My daughter gas the same issue as the OP - and her model no. is KDL-32EX403 with firmware PKG4.131EUL-0108.
Maybe this is sufficient information to prise someone at Sony, with some iota of the customer service gene, to actaully rise from their seat and post a reply to the problem which has left a number of customers with a non-functioning iPlayer issue on their TV sets.
