Everything worked fine in my old 1.5.2 Minecraft. After I updated to 1.7.10 the game just broke.
The game seems to take forever to register any action, like if I was playing on a server with a ping around 3000-4000. When I click with my sword in hand to kill a chicken it takes up to 5 seconds for it to be show dead on screen, and another 5 seconds for me to pick up the loot.
That happens with all my interactions with the world (mining, opening fences, etc).
I'm getting good FPS (never below 20) and my computer is overkill for minecraft (i5 2500k, Radeon HD6950 2Gb).
What can I do to solve it? I've already tried reloading the game.