The title pretty much says it all: At some places, especially near cave entrances, the vanilla code will generate Chiseled Sandstone, instead of the Red Sandstone (since that wasn't available in 1.7.10 yet]

Please use the template next time btw

After further code analysis I have determined this doesn't happen in vanilla 1.7.10. I'm not even sure how this picture was taken, and as for myself I guess I mandela'd myself into believing this bug was in the game, but I checked tons of mesa cave entrances and NONE of them had any sort of sandstone, it's just red sand that floats.

Is this screenshot even taken in 1.7.10? I cannot reproduce this at all. I looked at MC-55228 and its duplicates, going to every seed and coordinate and there was no chiseled sandstone, only regular sandstone.

I strongly remember this being a bug in 1.7.10 though, but I simply cannot find any chiseled sandstone, it just is red sand. Do you have any mods that are modifying cave generation perhaps??

Is the Cave generator setting Sand Blocks to Sandstone whenever it is carving? And does it just keep the Metadata? Because Sand Metadata is 1 for Red Sand and Chiseled Sandstone is Metadata 1 too, so this MIGHT be absolutely unrelated to Et Futurum at all whatsoever.

That is why it's labeled vanilla bug. I told him to put it here because I wanted to fix it in EFR anyways
But I can't find any seeds which reproduce the issue.