When placing or breaking blocks in single/multiplayer, blocks sometimes reappear since upgrading to 1.7.4

Put the summary of the bug you're having here

*What I expected to happen was...I could break blocks and they wouldn't reappear...the graphics are making my brain hurt
Describe what you thought should happen here: The blocks shouldn't reappear, this is the first time this has happened. I keep trying to play thinking it is just some weird glitch, but has been consistent for the past 3-4 days since update. I even tried playing a new game, but got the same results. The blocks break, then reappear, then disappear.

*What actually happened was...
Describe what happened here

Steps to Reproduce:
1. clicked on singleplayer and my old game
2. ...tried to break blocks in jungle
3. blocks break, but then reappear and then disappear...very frustrating.
3. ...