??? what does polar shifts have anything to do with alternate dimentions??? it seems the guy who wrote that was just a science fiction writer that was takeing advantage of a new theory at the time... but yea the poles will shift, the solar wind will somehow still be deflected, and as long as the thing about the landmasses shifting that cause it- doesnt happen (meaning that albert einstien would be wrong) then were gona be ok whenever it happens, which will probably be within the next few thousand years (so dont worry too much, althought the supernova thing will happen in like 3 billion years.... or something like that)
but i dont know that ill bet the farm on einstein being wrong.... its time to build your superearthquake proof, tsunami resistant, reverse-oriented compass containing, superbunker!!!