It's as big a load of crap as the Bermuda Triangle...

Draw a similar sized triangle over any area of the ocean (especially one that is over a major shipping lane or 2) and you'll find just as many 'odd' occurrences....

Thought I do enjoy needling theatre wankers who get bent outa shape by the 'superstition'

(See 3rd season Blackadder episode called "The Actors" IIRC)