But Sony - of all companies - seems to have forgotten the problems that its incompatible tape formulations caused in the early days of DV, judging by what we're seeing happen right now with HDV tape. We appear to be back in exactly the same situation again with incompatibilities between tapes causing head clogging. Sony, seemingly, decided that these new camcorders need a better formulation of tape the reasoning being, presumably, that drop-outs with HDV can be seriously problematic.