Cant jump / Cannot press multiple keys on the keyboard at one time

Not true, I tried and it works I can jump, you must have mods affecting that ability!

Cannot reproduce. Perhaps it is an issue with your LWJGL or your controls. Please attach your options.txt.

Please force a crash by pressing F3 + C for 10 seconds while ingame and attach the crash report here.

Could also be your keyboard. Is it wireless? Some wireless keyboards can only handle very few keys at the same time.

Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Manually triggered debug crash

A full error report has been saved to C:\Documents and Settings\HP_Ägaren\Application Data\.minecraft\crash-reports\crash-2013-01-06_17.24.52-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash 😞

— BEGIN ERROR REPORT 10bacbfa --------
Full report at:
C:\Documents and Settings\HP_Ägaren\Application Data\.minecraft\crash-reports\crash-2013-01-06_17.24.52-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 2013-01-06 17:24

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [azg['Rockyfelle185'/281, l='MpServer', x=664,80, y=70,62, z=189,96]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-104,64,248), Chunk: (at 8,4,8 in -7,15; contains blocks -112,0,240 to -97,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 361822 game time, 446045 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: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 128 total; [px['item.tile.sapling.oak'/1103, l='MpServer', x=615,47, y=77,13, z=183,13], ow['Bat'/1091, l='MpServer', x=714,59, y=46,67, z=148,00], ow['Bat'/1119, l='MpServer', x=687,35, y=36,63, z=164,52], azg['Rockyfelle185'/281, l='MpServer', x=664,80, y=70,62, z=189,96], qn['Skeleton'/784, l='MpServer', x=738,50, y=17,00, z=230,50], qn['Skeleton'/796, l='MpServer', x=602,50, y=68,00, z=163,50], oy['Chicken'/343, l='MpServer', x=594,41, y=72,00, z=205,56], ow['Bat'/342, l='MpServer', x=593,66, y=44,10, z=160,97], px['item.tile.sapling.oak'/1038, l='MpServer', x=699,88, y=73,13, z=171,13], ow['Bat'/612, l='MpServer', x=698,53, y=21,29, z=132,53], ow['Bat'/613, l='MpServer', x=702,75, y=22,67, z=129,09], px['item.tile.sapling.oak'/1025, l='MpServer', x=621,13, y=77,13, z=183,78], qr['Zombie'/890, l='MpServer', x=614,50, y=19,00, z=183,50], oy['Chicken'/345, l='MpServer', x=598,41, y=71,00, z=199,53], oy['Chicken'/344, l='MpServer', x=594,44, y=71,00, z=198,59], oy['Chicken'/332, l='MpServer', x=587,50, y=65,00, z=241,50], oy['Chicken'/333, l='MpServer', x=588,53, y=64,00, z=251,41], oy['Chicken'/330, l='MpServer', x=589,75, y=70,00, z=198,78], oy['Chicken'/331, l='MpServer', x=591,50, y=65,00, z=242,50], ow['Bat'/638, l='MpServer', x=667,53, y=20,26, z=205,13], qc['Creeper'/329, l='MpServer', x=585,00, y=41,00, z=167,56], qn['Skeleton'/850, l='MpServer', x=639,50, y=24,00, z=189,50], qn['Skeleton'/849, l='MpServer', x=641,45, y=24,00, z=193,53], qn['Skeleton'/848, l='MpServer', x=670,50, y=46,00, z=250,50], qn['Skeleton'/854, l='MpServer', x=598,50, y=68,00, z=129,50], qr['Zombie'/381, l='MpServer', x=633,50, y=46,00, z=119,50], qn['Skeleton'/858, l='MpServer', x=609,50, y=68,00, z=121,50], qr['Zombie'/380, l='MpServer', x=632,50, y=46,00, z=119,50], oz['Cow'/383, l='MpServer', x=631,34, y=69,00, z=174,47], qn['Skeleton'/856, l='MpServer', x=616,66, y=68,00, z=124,96], qr['Zombie'/382, l='MpServer', x=630,02, y=54,00, z=142,50], px['item.tile.sapling.oak'/1060, l='MpServer', x=661,78, y=77,13, z=169,78], qp['Spider'/379, l='MpServer', x=635,38, y=46,00, z=122,56], px['item.item.seeds'/1082, l='MpServer', x=679,25, y=63,13, z=229,19], px['item.item.seeds'/1075, l='MpServer', x=723,75, y=63,13, z=199,91], qc['Creeper'/360, l='MpServer', x=631,00, y=54,00, z=135,50], qr['Zombie'/361, l='MpServer', x=616,72, y=54,00, z=150,16], qc['Creeper'/362, l='MpServer', x=614,94, y=69,00, z=155,28], qr['Zombie'/363, l='MpServer', x=615,50, y=40,00, z=161,50], qp['Spider'/410, l='MpServer', x=644,41, y=24,00, z=194,06], oz['Cow'/411, l='MpServer', x=641,50, y=70,00, z=207,50], px['item.tile.sapling.oak'/408, l='MpServer', x=645,88, y=72,13, z=150,97], qc['Creeper'/685, l='MpServer', x=609,50, y=68,00, z=140,50], qc['Creeper'/409, l='MpServer', x=628,63, y=64,00, z=176,00], oz['Cow'/414, l='MpServer', x=640,50, y=71,00, z=211,50], qn['Skeleton'/952, l='MpServer', x=699,44, y=19,00, z=179,01], qc['Creeper'/953, l='MpServer', x=690,50, y=22,00, z=186,50], oy['Chicken'/415, l='MpServer', x=648,50, y=67,00, z=244,50], oz['Cow'/412, l='MpServer', x=641,44, y=71,00, z=204,50], oz['Cow'/413, l='MpServer', x=642,45, y=70,00, z=211,45], qr['Zombie'/402, l='MpServer', x=662,04, y=68,00, z=118,50], qr['Zombie'/403, l='MpServer', x=654,50, y=67,00, z=118,50], qp['Spider'/401, l='MpServer', x=653,50, y=39,00, z=119,50], ow['Bat'/406, l='MpServer', x=641,31, y=55,05, z=131,75], ow['Bat'/407, l='MpServer', x=642,25, y=55,82, z=131,63], qn['Skeleton'/404, l='MpServer', x=652,50, y=67,00, z=117,50], qn['Skeleton'/405, l='MpServer', x=651,50, y=67,00, z=112,50], oy['Chicken'/395, l='MpServer', x=633,50, y=67,00, z=268,50], oy['Chicken'/394, l='MpServer', x=633,50, y=67,00, z=269,50], oy['Chicken'/393, l='MpServer', x=632,50, y=67,00, z=268,50], qn['Skeleton'/700, l='MpServer', x=593,50, y=68,00, z=151,50], qn['Skeleton'/701, l='MpServer', x=598,38, y=68,00, z=149,99], qd['Enderman'/392, l='MpServer', x=632,59, y=71,00, z=232,50], oy['Chicken'/396, l='MpServer', x=632,50, y=67,00, z=268,50], qc['Creeper'/387, l='MpServer', x=631,22, y=18,00, z=206,16], qc['Creeper'/695, l='MpServer', x=596,50, y=68,00, z=151,50], oz['Cow'/386, l='MpServer', x=627,50, y=68,00, z=165,50], oz['Cow'/385, l='MpServer', x=635,91, y=68,00, z=161,97], oz['Cow'/384, l='MpServer', x=625,75, y=70,00, z=173,50], qc['Creeper'/693, l='MpServer', x=612,50, y=68,00, z=138,50], qn['Skeleton'/391, l='MpServer', x=632,50, y=74,00, z=226,04], qc['Creeper'/390, l='MpServer', x=633,00, y=19,00, z=211,44], ow['Bat'/389, l='MpServer', x=637,00, y=17,02, z=207,00], qc['Creeper'/388, l='MpServer', x=629,50, y=18,00, z=205,50], pe['Sheep'/440, l='MpServer', x=670,50, y=66,00, z=237,50], pe['Sheep'/441, l='MpServer', x=666,53, y=64,00, z=239,56], oy['Chicken'/442, l='MpServer', x=652,65, y=65,00, z=243,68], px['item.tile.sapling.oak'/432, l='MpServer', x=671,16, y=75,13, z=133,38], px['item.tile.sapling.oak'/433, l='MpServer', x=661,06, y=76,13, z=165,81], oz['Cow'/434, l='MpServer', x=661,68, y=68,00, z=213,35], oz['Cow'/435, l='MpServer', x=651,18, y=69,00, z=203,06], oz['Cow'/436, l='MpServer', x=661,66, y=68,00, z=214,56], oz['Cow'/437, l='MpServer', x=662,10, y=68,00, z=211,40], pe['Sheep'/438, l='MpServer', x=663,60, y=64,00, z=241,09], pe['Sheep'/439, l='MpServer', x=663,02, y=64,00, z=239,94], px['item.tile.sapling.oak'/431, l='MpServer', x=663,88, y=76,13, z=135,19], oy['Chicken'/417, l='MpServer', x=648,50, y=67,00, z=240,50], oy['Chicken'/416, l='MpServer', x=649,50, y=66,00, z=240,50], qc['Creeper'/478, l='MpServer', x=697,50, y=23,00, z=192,50], px['item.tile.sapling.oak'/479, l='MpServer', x=693,78, y=75,13, z=193,13], qn['Skeleton'/476, l='MpServer', x=692,25, y=38,00, z=183,22], qc['Creeper'/477, l='MpServer', x=693,69, y=22,00, z=189,56], qr['Zombie'/474, l='MpServer', x=694,01, y=22,00, z=190,59], qc['Creeper'/475, l='MpServer', x=690,50, y=23,00, z=191,50], oz['Cow'/472, l='MpServer', x=697,78, y=71,00, z=144,25], px['item.tile.sapling.oak'/473, l='MpServer', x=702,03, y=74,13, z=174,78], ow['Bat'/470, l='MpServer', x=701,03, y=43,10, z=133,59], qr['Zombie'/471, l='MpServer', x=701,47, y=51,00, z=161,10], ow['Bat'/469, l='MpServer', x=701,47, y=43,10, z=133,31], qr['Zombie'/743, l='MpServer', x=585,69, y=41,00, z=166,50], px['item.item.seeds'/461, l='MpServer', x=678,63, y=64,13, z=235,53], ph['Squid'/460, l='MpServer', x=682,53, y=61,13, z=228,72], ph['Squid'/459, l='MpServer', x=688,50, y=59,34, z=224,88], ph['Squid'/458, l='MpServer', x=688,06, y=60,34, z=220,50], px['item.tile.sapling.oak'/456, l='MpServer', x=677,16, y=76,13, z=170,88], px['item.tile.sapling.oak'/455, l='MpServer', x=683,88, y=67,13, z=165,13], ow['Bat'/454, l='MpServer', x=686,97, y=23,33, z=174,97], px['item.tile.sapling.oak'/453, l='MpServer', x=684,13, y=81,13, z=128,44], qr['Zombie'/452, l='MpServer', x=678,41, y=33,00, z=137,09], qr['Zombie'/451, l='MpServer', x=683,50, y=33,00, z=138,50], qc['Creeper'/450, l='MpServer', x=683,32, y=39,00, z=139,01], qn['Skeleton'/449, l='MpServer', x=685,50, y=25,00, z=141,50], px['item.item.seeds'/509, l='MpServer', x=724,25, y=62,13, z=192,44], qr['Zombie'/976, l='MpServer', x=610,50, y=20,00, z=185,50], px['item.tile.sapling.oak'/496, l='MpServer', x=707,53, y=66,13, z=174,06], px['item.tile.sapling.oak'/497, l='MpServer', x=704,75, y=76,13, z=165,84], px['item.tile.sapling.oak'/498, l='MpServer', x=707,19, y=75,13, z=174,13], qn['Skeleton'/971, l='MpServer', x=607,50, y=20,00, z=180,50], oz['Cow'/493, l='MpServer', x=716,44, y=70,00, z=145,38], px['item.tile.sapling.oak'/1203, l='MpServer', x=648,53, y=76,32, z=157,44], oz['Cow'/492, l='MpServer', x=712,91, y=69,00, z=151,50], px['item.tile.sapling.oak'/495, l='MpServer', x=709,28, y=78,13, z=156,13], px['item.tile.sapling.oak'/494, l='MpServer', x=712,31, y=68,13, z=159,81], oz['Cow'/491, l='MpServer', x=710,91, y=68,00, z=158,94], qn['Skeleton'/973, l='MpServer', x=608,50, y=20,00, z=178,50], qn['Skeleton'/972, l='MpServer', x=606,90, y=23,00, z=176,50], qn['Skeleton'/481, l='MpServer', x=689,28, y=62,21, z=219,38], ph['Squid'/480, l='MpServer', x=683,50, y=61,31, z=215,50]]
Retry entities: 0 total; []
Stacktrace:
at azd.a(SourceFile:281)
at net.minecraft.client.Minecraft.b(SourceFile:1872)
at net.minecraft.client.Minecraft.run(SourceFile:543)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 13w01b
Operating System: Windows XP (x86) version 5.1
Java Version: 1.7.0_09, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 343849688 bytes (327 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 12931 (724136 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
LWJGL: 2.4.2
OpenGL: GeForce 7900 GTX/PCI/SSE2/3DNOW! GL version 2.0.1, NVIDIA Corporation
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1481 (82936 bytes; 0 MB) allocated, 10 (560 bytes; 0 MB) used

java.lang.Throwable
at net.minecraft.client.Minecraft.l(SourceFile:1172)
at net.minecraft.client.Minecraft.J(SourceFile:582)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Unknown Source)
— END ERROR REPORT 9aa6293d ----------

No mods, they keyboard is wireless but as said works with right+forward and jump

Try getting LWJGL 2.8.4.

right+forward and jump? you said left

Its does NOT work with left, but works with anyhting else, like right

Many wireless keyboards have trouble combining multiple keys. Try remapping the jump action and see if it still happens.

WOW. Geforce 7900 GTX? You really need an upgrade and more RAM. I know that is off topic but what is the ~FPS that you get?

Maybe a better keyboard with better ghosting

Jon Trollsten: Don´t see a reason to upgrade, my fps is high, not sure exact, and I never experience lagg or else, but keyboard is probably the solution... even though I love the one I have and won´t get a new one...

How is this closed because it can't be re produced. To reproduce this bug hold down W & A and than left click, or push space bar!

Again, depends on the keyboard. Many nonstandard keyboards like laptop or wireless devices have a lower simultaneous key limit, and the spacebar is a key that usually demands more. So you can't usually combine more than 3 keys if one is the spacebar.

If the mouse button is participating in the problem, then you might have either a laptop setup where the keyboard and mouse participate in the same ps2 connection or a wireless relay with the keyboard as middleman.

Just throwing ideas.

What happens if you open an editor and press and hold W & A and press Space ?
I get

awwwwwwwwwwwwwwwwwww_

(Replace _ with blank)

If you don't see the blank when pressing space, your keyboard cannot handle that combination of keystrokes.

This is a hardware issue, see MC-54194