Does your tire look something like the tire in this other post in Road Cycling

Hutchinson tire failure - anyone seen this?

I might can believe that it wasn't vulcanized correctly. Use to be an issue on tires for automobiles way back in my childhood. I seem to remember several time my dad had to replace tires for blisters where the tread was coming loose and making a funny sound down the highway.

Continental Bike Tire has a contact page. Email them and see what they say. Some members here in the past do claim they actually got a discount on next purchase or a free tire out of it.