Rethinking the X(3872)

The BaBar analysis which favours 2-+ quantum numbers for the X(3872) implies that it may be none other than the 1 1D2 charmonia state. In that case the isospin breaking in closed flavour modes may be the result of re-scattering from open flavour. However, the observed production cross section in proton-antiproton collisions is much larger than expectations, while the mass of the state, compared to the predictions of a string model, is too large. The 1D2 assignment would imply a 3D2 partner nearby in mass, which may be the X(3875). In the tetraquark interpretation the 2-+ assignment implies a rich spectrum of partner states, although the X(3872) may be among the few which are narrow enough to be observable. This talk is based in part on ref. [1].