WumpaCraft

Commands are as follows:

/scoreboard objectives add radar trigger

This is on a clock to enable it for anyone joining the server:

/scoreboard players enable @a radar

/tellraw @a[m=0] {"text":"","extra":[{"text":"[Activate Radar]","color":"green","bold":"true","clickEvent":{"action":"run_command","value":"/trigger radar set 1"}}]}

(Also on a clock so it is constantly on the screen)

Interstingly, when in creative, the command seems to work around half the time, but when in survival it doesn't work at all.
This is the case even without the [m=0] argument

Crash Report

There is also a problem using /execute testfor. I had this command on a clock:
/execute @e[type=Zombie] ~ ~ ~ testfor @a[r=10]
but even if I was out of range, as long as there was a zombie in the world, the comparator always outputted

It's worth noting that since co-ordinates in a command are given 0.5 added to them to center them on a block, the co-ordinates are only offset by -1x or z, not -2

This is also the case with snowballs, eggs, books, maps, food, potions, and bows too 😞

I looked at the log when I was running the server, and it came up with more errors

This happens to people connecting to my server too. I'm not sure if it's a minecraft launcher issue though, more a minecraft one.

Server log from when the issue started happening

Increasing the maximum string length is what I think Mojang needs to do to fix the bug. It's not possible to do if you're just a regular server owner, like me and you.

Oh whoops. The NBT data on the item didn't include UUIDs, but I added them in and it worked fine! 😃 Thanks!

Here's a video showing exactly what happens (plus another bug to do with taking the armour off): http://www.youtube.com/watch?v=e7IpyDZHqpg&feature=youtu.be
And here's the NBT data: http://imgur.com/g6LC4zA

But it's still a bug though...

I guess. Found out that the moving thing only happens at slowness 6+. The view inverts at 23.

No! Please don't remove this! It's true but it's soooo awesome! Well, the movement's a little weird but the view is amazing!

Sorry Tails, but it looks like they're right. 😞

It's true!