Minecraft Forums

Hi I have an issue with blocks being mined 3-4 times and immediately reappearing before disappearing as well as lag.
The block issue persists even without movement lag though. Also I only play single player and played 1.5* offline for ages with no internet and no issues before getting online again and updating.

Copied the dev console output to http://pastebin.com/qQTAMTyB

This is parts I wonder if is relevant:
[21:15:13 INFO]: Client> [21:15:13] [Server thread/WARN]: Can't keep up! Did the system time change, or is the server overloaded? Running 2734ms behind, skipping 54 tick(s)

[21:15:21 INFO]: Client> [21:15:21] [Client thread/INFO]: Warning: Clientside chunk ticking took 532 ms

[21:15:25 INFO]: Client> [21:15:25] [Client thread/INFO]: Warning: Clientside chunk ticking took 1235 ms

[21:15:28 INFO]: Client> [21:15:28] [Client thread/INFO]: Warning: Clientside chunk ticking took 1797 ms

[21:15:29 INFO]: Client> [21:15:29] [Client thread/INFO]: Warning: Clientside chunk ticking took 922 ms

[21:15:31 INFO]: Client> [21:15:31] [Client thread/INFO]: Warning: Clientside chunk ticking took 1453 ms

[21:15:55 INFO]: Client> [21:15:55] [Client thread/INFO]: Warning: Clientside chunk ticking took 1297 ms

[21:16:00 INFO]: Client> [21:16:00] [Client thread/INFO]: Warning: Clientside chunk ticking took 391 ms

[21:16:19 INFO]: Client> [21:16:19] [Client thread/INFO]: Warning: Clientside chunk ticking took 1719 ms

[21:16:27 INFO]: Client> [21:16:27] [Client thread/INFO]: Warning: Clientside chunk ticking took 1234 ms

[21:17:02 INFO]: Client> [21:17:02] [Client thread/INFO]: Warning: Clientside chunk ticking took 1578 ms

No ideas anyone?
I deleted .minecraft and reinstalled, dropped max memory to 400m from 1 gig and lag pretty much disappeared after initial loading of area but mining ore, chopping wood etc up to 4 times before block drops as resource instead of reappearing renders unplayable.

I've been experiencing block lag the last two days. I'm in the 14w11b snapshot. I wash't having issues earlier in the week. The last update to my computer was for Safari on April 2. I've been play in a single player world so I have no idea why I'm having issues.