it's working, more or less :-O
OK, am somewhat confused now.
Last night I updated the firmware in my BDP5200 (to 1.31 from 1.00) and just for the hell of it I gave iPlayer another try.
It worked. Nice one!
Don't know for sure if this is due to the firmware (cos it had been a couple of days since I had last tried it) but I'm thinking it probably was (?).
However, I say "working, more or less" because although it plays beautifully, the controls appear to be a bit, em, crippled.
I can fast-forward, but only at 4x speed (a bit disappointing). I can pause. But the killer is that I can't rewind AT ALL. The only option if you miss a bit appears to be starting from scratch (and with the limited speed fast-forward, that could get to be a bit of a chore).
So, yay for Philips/BBC, but please tell me I'm missing a magic button that will give me access to rewind (and faster seeking, e.g. direct time seek)... Or else I might end up reverting to the (also painful but for different reasons) iPlayer on my Wii.