It started with a post by well-known forum member Ronnie, who pointed out that Frampton did not necessarily confirm that we would be able to choose a seed for a certain world. The OK majicDave tweeted recently could have been simply saying seeds could be added, since world generation seeds have actually existed for some time (as seen in the server logs of world generation). Ronnie also supported the possibility of his theory by stating that "emiljunior did not ask for players tobe able to manipulate the world seed, although he very likely intended to do so." Ronnie said this simply to say everyone's hype could be misplaced and they may end up disappointed.
To follow that up, another well-known forum member, Skeeve, brought up 3 meanings of the OK Dave had tweeted. The first was a "sarcastic OK," meaning "yeah right ... good luck with that". The second, which people had been assuming and hoping for, was a "teaser OK," maning "I've done ... thst in version 1.6.1." Skeeve said this was what he too was hoping for. Then, the third possibility Skeeve noted was that we all could have completely misunderstood and the OK could have been about something completely unrelated to seeds, and Dave could have been saying "OK" to the remainer of emiljunior's tweet which thanked him for the game and jetpacks.
Because of these two posts, Dave made a post in the thread. "I can confim," he began. "There are a few caveats, you can't set it in every world for every situation, but there will be an option in 1.6.1 to set a custom world seed for some new worlds. No more details for now." The post also confirmed that the next update will indeed be majorly a bug fix update (1.6.1), not one full of new content (1.7).