I'll test the new version right now to see if everything works fine.
So I tested it now. Minecraft doesn't crash when clicking the buttons but since the update my FPS are pretty bad. In v1.0.2 I've 60fps the whole time but in the newest version I nearly get over 30fps (same world, same position).
I don't know what's changed but I think it shouldn't be that different.
There isn't anything we've changed which should influence the performance.
People have thanked us for increasing performance from 1.0.1 to 1.0.2 - we didn't do a thing.
I suspect this might be a placebo of some sort. If we do increase performance in any noticeable way we do state that in the change log.
I myself haven't noticed any difference from 1.0.2 to 1.0.3
I suggest you load up 1.0.2 again and compare them directly, if you do indeed find some noticeable difference in performance which are reproducible, please open a new thread for that. I'll then send you a whole lot of versions (every single change we did in its own version). You can then test them all to find which commit caused the performance decrease. (That is assuming I cannot reproduce the performance difference myself, in which case I'd do all that myself). Once we know what change caused the decrease, we'll then try to fix it.
