I took the chromahills resource pack off and it's ALSO happening with the default resource pack.
We have just explored a huge ocean in our realm and every treasure map we came across is of the same island. So we tried a different ocean 10 maps away and found a pirate ship with a treasure map and yup STILL the same treasure map, and yes it was one of the first ones that we found and plundered.
Come on Majong - Time to fix this - I was hoping it would be in the Hotfix today but a lass no!
Just been to the nether and its like the whole world is frozen.
Yup - They are invisible!!! my whole map room is empty, and my hidden door behind the painting can be seen.
Yup us too, ruined nether portals all very different spawning all over the overworld, some are more complete than others, and differing sizes, normally with a block of gold on top with perhaps a couple of crying obsidian amoung the rest of the obsidian. the nearest surrounding area has netherrack, magma blocks and some have pools of lava, then in about 5 or 6 blocks it goes back to the normal overworld biome.
OK seems to happen only when I load up Java through steam... just loaded it up with KBM and everything is fine.