James - no, not especially. At first, the LBS suggested that I might have been under-inflating, which prompted the purchase of a pressure gauge. After that I was running at around 100 psi. Failure was exactly as you describe - threads failing next to the wire bead causing the casing & bead to separate. This always occurred on the rear wheel & with 3 different wheel-sets on 2 bikes, which ruled out damaged/burred rims etc. It seems the repeated flexing of the tyre at this point caused the failure.
Ed
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