Changing versions cause Minecraft to stop generating Amplified

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]) here.

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 13-07-2014 16:36
Description: Manually triggered debug crash

java.lang.Throwable
	at bao.p(SourceFile:1405)
	at bao.ak(SourceFile:774)
	at bao.f(SourceFile:728)
	at net.minecraft.client.main.Main.main(SourceFile:148)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at bjf.a(SourceFile:289)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bjk['PeterAS17'/418, l='MpServer', x=420,28, y=87,63, z=-46,13]]
	Chunk stats: MultiplayerChunkCache: 602, 602
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (138,64,59), Chunk: (at 10,4,11 in 8,3; contains blocks 128,0,48 to 143,255,63), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 3099 game time, 3099 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 102 total; [yl['Esqueleto'/550, l='MpServer', x=387,63, y=25,00, z=-10,13], xz['Creeper'/551, l='MpServer', x=394,72, y=27,00, z=-3,25], xz['Creeper'/548, l='MpServer', x=402,13, y=27,00, z=-0,75], xz['Creeper'/549, l='MpServer', x=396,31, y=27,00, z=-5,06], yq['Zombie'/546, l='MpServer', x=391,88, y=89,00, z=-7,47], yq['Zombie'/547, l='MpServer', x=384,50, y=95,00, z=-16,50], xz['Creeper'/544, l='MpServer', x=379,94, y=73,00, z=-28,47], xz['Creeper'/545, l='MpServer', x=384,00, y=72,00, z=-13,63], yl['Esqueleto'/554, l='MpServer', x=394,50, y=87,00, z=-5,50], yl['Esqueleto'/552, l='MpServer', x=395,38, y=90,00, z=6,09], yl['Esqueleto'/553, l='MpServer', x=393,50, y=88,00, z=-6,50], yq['Zombie'/575, l='MpServer', x=412,09, y=64,00, z=-34,44], yl['Esqueleto'/574, l='MpServer', x=410,50, y=45,00, z=-37,50], wp['Ovelha'/573, l='MpServer', x=401,69, y=248,00, z=-97,69], xz['Creeper'/513, l='MpServer', x=359,63, y=112,00, z=-9,94], xz['Creeper'/514, l='MpServer', x=371,44, y=119,00, z=-1,97], ya['Enderman'/524, l='MpServer', x=376,50, y=75,00, z=-25,50], yl['Esqueleto'/525, l='MpServer', x=378,50, y=73,00, z=-0,50], xz['Creeper'/526, l='MpServer', x=382,50, y=73,00, z=-0,50], yq['Zombie'/527, l='MpServer', x=375,50, y=119,00, z=-1,50], yq['Zombie'/522, l='MpServer', x=367,56, y=14,00, z=-36,03], yq['Zombie'/523, l='MpServer', x=375,50, y=75,00, z=-25,50], xz['Creeper'/529, l='MpServer', x=382,31, y=73,00, z=2,41], yq['Zombie'/528, l='MpServer', x=369,78, y=112,00, z=-5,25], xz['Creeper'/530, l='MpServer', x=383,03, y=74,00, z=3,53], wp['Ovelha'/541, l='MpServer', x=396,50, y=256,00, z=-92,66], wp['Ovelha'/540, l='MpServer', x=397,59, y=256,00, z=-94,16], yq['Zombie'/543, l='MpServer', x=396,38, y=31,00, z=-34,38], wp['Ovelha'/542, l='MpServer', x=396,25, y=256,00, z=-93,81], xz['Creeper'/537, l='MpServer', x=391,00, y=82,04, z=-118,77], wg['Galinha'/610, l='MpServer', x=444,50, y=63,00, z=-82,50], wg['Galinha'/611, l='MpServer', x=437,44, y=66,00, z=-69,41], we['Morcego'/608, l='MpServer', x=444,28, y=36,10, z=-120,59], we['Morcego'/609, l='MpServer', x=449,31, y=41,64, z=-112,19], yq['Zombie'/614, l='MpServer', x=447,50, y=64,00, z=-45,03], wg['Galinha'/612, l='MpServer', x=446,50, y=64,00, z=-85,50], yq['Zombie'/613, l='MpServer', x=448,41, y=56,00, z=-36,00], yl['Esqueleto'/631, l='MpServer', x=461,50, y=44,00, z=-121,50], yl['Esqueleto'/630, l='MpServer', x=464,06, y=43,00, z=-120,47], xk['item.tile.mushroom'/635, l='MpServer', x=455,13, y=11,13, z=-72,13], wg['Galinha'/634, l='MpServer', x=448,50, y=64,00, z=-82,50], we['Morcego'/633, l='MpServer', x=457,51, y=43,23, z=-83,69], xz['Creeper'/632, l='MpServer', x=461,50, y=43,00, z=-118,50], yq['Zombie'/639, l='MpServer', x=448,50, y=58,00, z=-49,09], we['Morcego'/638, l='MpServer', x=460,25, y=43,30, z=-63,01], xz['Creeper'/637, l='MpServer', x=451,88, y=25,65, z=-60,72], yl['Esqueleto'/636, l='MpServer', x=455,50, y=27,00, z=-67,50], yq['Zombie'/576, l='MpServer', x=407,50, y=63,00, z=-23,50], yl['Esqueleto'/577, l='MpServer', x=400,72, y=65,00, z=-18,78], xz['Creeper'/578, l='MpServer', x=407,50, y=28,00, z=-6,50], yl['Esqueleto'/579, l='MpServer', x=409,50, y=26,00, z=-0,94], yq['Zombie'/580, l='MpServer', x=422,06, y=29,00, z=-2,50], yq['Zombie'/581, l='MpServer', x=415,50, y=55,00, z=4,50], yl['Esqueleto'/582, l='MpServer', x=414,50, y=52,00, z=3,50], yq['Zombie'/583, l='MpServer', x=415,50, y=76,00, z=1,50], xk['item.item.dyePowder.black'/590, l='MpServer', x=421,94, y=49,13, z=-97,00], ws['Lula'/591, l='MpServer', x=417,50, y=62,34, z=-91,38], we['Morcego'/593, l='MpServer', x=427,07, y=47,17, z=-10,35], ws['Lula'/592, l='MpServer', x=420,53, y=62,00, z=-94,97], yl['Esqueleto'/595, l='MpServer', x=419,50, y=35,00, z=6,50], xz['Creeper'/594, l='MpServer', x=426,50, y=18,00, z=14,50], wg['Galinha'/597, l='MpServer', x=426,38, y=215,00, z=28,59], yq['Zombie'/596, l='MpServer', x=416,50, y=81,00, z=6,50], wg['Galinha'/599, l='MpServer', x=424,56, y=221,00, z=27,47], wg['Galinha'/598, l='MpServer', x=424,50, y=214,00, z=28,50], wg['Galinha'/600, l='MpServer', x=428,50, y=240,00, z=25,50], we['Morcego'/958, l='MpServer', x=471,98, y=22,16, z=-114,58], we['Morcego'/949, l='MpServer', x=453,35, y=21,89, z=-125,18], we['Morcego'/673, l='MpServer', x=481,49, y=15,72, z=-18,56], ws['Lula'/672, l='MpServer', x=477,41, y=58,34, z=-68,50], wg['Galinha'/702, l='MpServer', x=499,50, y=81,00, z=-4,50], wg['Galinha'/703, l='MpServer', x=499,50, y=81,00, z=-7,50], wg['Galinha'/701, l='MpServer', x=498,50, y=81,00, z=-5,50], yq['Zombie'/698, l='MpServer', x=498,50, y=38,00, z=-39,91], we['Morcego'/385, l='MpServer', x=348,66, y=31,98, z=-75,92], yq['Zombie'/692, l='MpServer', x=500,31, y=32,00, z=-55,16], yn['Aranha'/693, l='MpServer', x=498,97, y=28,00, z=-62,69], ya['Enderman'/655, l='MpServer', x=472,50, y=38,00, z=-112,50], yl['Esqueleto'/654, l='MpServer', x=464,50, y=44,00, z=-125,50], xz['Creeper'/641, l='MpServer', x=451,22, y=13,00, z=-36,16], xz['Creeper'/640, l='MpServer', x=453,22, y=13,00, z=-40,16], xz['Creeper'/642, l='MpServer', x=448,50, y=13,00, z=-33,50], yl['Esqueleto'/670, l='MpServer', x=486,50, y=24,00, z=-121,50], yl['Esqueleto'/671, l='MpServer', x=480,50, y=36,00, z=-94,50], ws['Lula'/660, l='MpServer', x=473,50, y=59,34, z=-68,50], we['Morcego'/661, l='MpServer', x=480,58, y=16,17, z=-18,47], yq['Zombie'/662, l='MpServer', x=468,50, y=16,00, z=-40,50], we['Morcego'/656, l='MpServer', x=472,94, y=34,25, z=-99,21], we['Morcego'/657, l='MpServer', x=472,70, y=35,86, z=-98,79], we['Morcego'/658, l='MpServer', x=471,78, y=37,48, z=-108,02], ws['Lula'/659, l='MpServer', x=477,50, y=56,00, z=-69,50], xz['Creeper'/478, l='MpServer', x=350,50, y=18,00, z=-31,50], yl['Esqueleto'/477, l='MpServer', x=349,13, y=81,00, z=-47,72], yq['Zombie'/470, l='MpServer', x=350,34, y=49,00, z=-126,66], bjk['PeterAS17'/418, l='MpServer', x=420,28, y=87,63, z=-46,13], xz['Creeper'/509, l='MpServer', x=366,50, y=14,00, z=-37,50], xz['Creeper'/510, l='MpServer', x=352,50, y=27,00, z=-38,50], xz['Creeper'/511, l='MpServer', x=358,50, y=118,00, z=-16,50], yq['Zombie'/504, l='MpServer', x=352,34, y=49,00, z=-121,66], we['Morcego'/505, l='MpServer', x=342,14, y=14,50, z=-66,95], wg['Galinha'/704, l='MpServer', x=497,50, y=81,00, z=-6,50], we['Morcego'/961, l='MpServer', x=456,19, y=21,78, z=-125,14]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bjf.a(SourceFile:289)
	at bao.b(SourceFile:1972)
	at bao.f(SourceFile:737)
	at net.minecraft.client.main.Main.main(SourceFile:148)

-- System Details --
Details:
	Minecraft Version: 1.7.10
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 245738744 bytes (234 MB) / 642252800 bytes (612 MB) up to 954728448 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Launched Version: 1.7.10
	LWJGL: 2.9.1
	OpenGL: GeForce GTX 760/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Português (Portugal)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Anisotropic Filtering: Off (1)

This is the forced crash report. Hope it helps! 🙂 By the way, you have to give me one hug, since the crash gave me one token to it! (Just kidding)

Cannot confirm, world remains amplified when changing versions.
See screenshots and crash reports:

Minecraft Version: 1.7.9
	Level generator: ID 03 - amplified, ver 0. Features enabled: false

Minecraft Version: 1.7.10
	Level generator: ID 03 - amplified, ver 0. Features enabled: false

By the way, you have to give me one hug, since the crash gave me one token to it! (Just kidding)

Glad to be no Mojansta, since the crash report says:

// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Wow, this was akward... I just updated and the world is no more amplified... O.o
"Glad to be no Mojansta, since the crash report says:" What do you mean with that?

The cras report says: 1 free hug. Redeem at your nearest Mojangsta . I'm no Mojangsta, so I don't need to hug you 😉

Oh xD By the way, I think you can close the issue already, since you proved that it was just an akward bug

Yep, it was just an akward coincidence. Even if I went forward, the amplified world still would go on and generate itself, but then stopped again, and restarted... XD