I think worldwide grounding calls are a bit premature - these things have flown tens of thousands of hours with a very good safety record.
However the multiple emerging incidents concerning the ADIRU (Air Data Inertial Reference Units for the uninitiated) and flight control computer interface must surely be causing a lot of angst within Airbus. They really need to get it sorted in quick time.
Of interest to me is that apparently the ADIRUs in, for example, the QF incident were made by a different manufacturer than the ones in the AF incident. Possibly points to deeper problems than just the units themselves, IMHO. Pure speculation of course, but this might be just one of those "swiss cheese" things where normally perfectly safe computer systems align in a one-in-a-million situation to produce a bizarre and potentially disastrous result.