In general, goalkeepers get far too much protection but what's niggling them is that for the next 100 similar incidents, nigh on all of them will be given in favour of the goalkeeper. Their annoyance is that theirs was the one that wasn't given, which I think is understandable.
If that happened to us, I'd be expecting a foul to be given.
EDIT : I didn't think it warranted a free kick personally. Pantilimon was a weak as a fart.