I only play creative with one world.  I have 5 different places to back up my single world because I have lost so many to this ambiguous error over the years, since my PS3 my world would spontaneously combust.  Things were amazing for the last 5 months but now I have had my world contaminated and shutting itself down 4 times in two weeks.  My world will open for about 10 seconds then shut down.  I even pay for the online backup but that barely helps.  If it contaminates upon the exit, then the following online save is already corrupt.

 "An error has occurred in the following application (CE-38700-8)

 Minecraft