Canon 5D MkIII Light Leak Issue!

I was skeptical when my contact told me that the spanking new, much desired Canon 5D MkIII suffered from light leak; 

Canon? 

Come on! And April 1 was 14 days ago!

Well, yesterday Canon issued a product advisory:

To Users of the Canon EOS 5D Mark III Digital SLR Camera-  Thank you for using Canon products.

The phenomenon described below has been confirmed when using the Canon EOS 5D Mark III Digital SLR Camera.