BBC Online has been struck by ongoing server issues since Saturday morning.
The flagship website, bbc.co.uk, is currently running a "simplified version" due to unspecified "technical problems".
Frustrated users were unable to access any videos on the BBC's iPlayer platform - including the Grand Prix and Inspector Montalbano - and took to Twitter and online forums to complain that they were faced with a '500 error message' with no explanation.
500 errors occur when the server encounters an unexpected condition that prevents it from fulfilling the request by the client.
Some users report that they are still unable to access programmes, or that programmes that were previously available have disappeared from the listings.
The BBC said: "We're aware of an issue which means some people can't access certain parts of BBC Online. We're working hard to fix this as soon as possible."
In June, the broadcaster recently announced that it had improved the performance of itsiPlayer video on-demand service after moving from its legacy relational database system onto a NoSQL platform.
Postgate is currently the BBC's controller of R&D, where he is responsible for a number of teams working on innovation, internet technologies and operations
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