There weren’t that many. I can only recall three or four being shown on-camera. There were a few movements elsewhere; Nick Heidfeld scythed through the field, whilst vitaly Petrov was caught on the hrd tyres by the Saubers – but overall, there were comparatively few overtakes in Barcelona. Which just goes to show how poor the circuit itself is: it had the longest DRS zone, and the fewest overtakes.
I’ve seen two figures being banded about on Twitter – one said 88, the other 60 (which sounds more reasonable to me). If it was 60, then that’s more than the previous nine races there put together.