Does anyone know how to get rid of "structure blocks" that appear when I try to upload a 710 world past version 8. several months ago I was successful in up loading 3 worlds but now whenever I open a 710 world in any version above version 8, these structure blocks cover much of the world even it contain nothing but vanilla blocks. Reopen in 710 or 8 and the world is correct.
Ignore picture the wrong one uploadee
Well I have really screwed this up. Screen shot 2 above is correct