Occasionally I can't break blocks and I also get crashes. Not sure if the two bugs are linked.
I've attached the error report
MC-7829
Minecraft Crash - Not sure what causes it - Error report attached
Resolved
Duplicate
0
Rowan Clark
(Unassigned)
Unconfirmed
crash
Snapshot 13w03a
Retrieved
Based on a crash report provided in this issue, I believe with high certainty that this report may be a duplicate of MC-7622. If I am wrong, please go yell at Dinnerbone.