Using /Summon with ActiveEffects Crashes the Cilent

I can confirm this, though I can't actually type in that command as it goes over the command character limit.

I had the same problem but I found a specific reason. I typed it in like this: /summon Zombie 1447 56 651 {ActiveEffects:[0:{Id:14,Amplifier:0,Duration:1000,Ambient:0}]} and it worked but when I typed 'Id:14' in with a lowercase i, it would cause my game to crash and every time I tried to join the game it would crash.

Avik,
I typed this in a Command Block.

The command should be:

/summon Zombie 1447 56 651 {Equipment:[{},{},{},{},{id:302,Damage:100000}],HealF:1,ActiveEffects:[0:{Id:1,Amplifier:0,Duration:10000,Ambient:1}]}

There still is a bug though I'm not sure if it has been otherwise reported but it will let you spawn in a mob with the ActiveEffects Id with a lowercase i even though that causes the game to crash.

Case matters.