The nether and the End have been reset! You were all warned this would happen on Thursday!
If your client crashes upon login, try using this config (https://www.dropbox.com/s/s8tjbfzfqu6rm92/immibis-microblocks.cfg) (save as “immibis-microblocks.cfg” and place it in your config folder, if you have trouble finding that click “Edit Modpack” in the launcher, then go up one folder… config should be there).
There are some strange issues going on with Chisel mod blocks (specifically, the stairs… but I warned everyone that was a known issue in a previous post); just break them and replace, they will fix themselves. If you have some microblocks that have disappeared let an Admin know as we’ll need to clear that out by hand in order for you to be able to place things there again (we may also provide replacement material, your mileage may vary).