I myself am a bit torn between muqq's opinion and the people like manic. Ok, they may have abused the bug with or without knowing it. The point is that it's not their fault Blizz let an encounter go out there without testing it thoroughly. They finish the 25 man first in the world by using a bug, so what? Blizz! quick fix the bug like you did but don't take their stuff away, and by all means don't ban them for your mistake!
At the same time, Ensidia cannot claim to have truly finished the 25 encounter first until AFTER the quick fix and battle the LK the way it was intended. Beat that damn boss the right way first and then brag. I'm sure you can do it, right? Muqq did make me laugh with the almost carbon copy rant at the end of his post though.
In the end, things could have been handled differently thrice by Blizz, Ensidia, and Muqq. However, hindsight is 20/20 and everyone will be micro-scoped for the things they do. Get over yourself whoever thinks they're right, Blizz and muqq. Do what makes you happy. If that's playing a "crappy" game like WoW with people you enjoy from your guild, then do it. And Blizz don't punish people for exploiting bugs you don't bother to recognize until after they're exploited! You screwed up, let them have their gear and fix your screw up!