Okay so I was building my minecraft hunger games and after messin around with some minecart and tnt spamming in TU19 i go into TU20 and POOF... It says I cant place anymore minecarts. I exploded all my MCTNT but they countered in as there... Weird. And They just introduced this and this update sucks! Even if you break minecarts its still there. Apparently. Dont hate this is what happened.
It is actually pinned at the top of this forum page, and titled: "MCXBLA OFFICIAL KNOWN BUGS LIST [TU20]"