Whenever i place down Spruce Wood on a server, my game crashes, crash report:

---- Minecraft Crash Report ----
// Why did you do that?

Time: 18/06/14 20:20
Description: Unexpected error

java.lang.IllegalArgumentException: Cannot set property ayi

as it does not exist!
at axy.a(SourceFile:128)
at atx.a(SourceFile:35)
at afg.a(SourceFile:61)
at aht.a(SourceFile:113)
at bxx.a(SourceFile:318)
at blh.ar(SourceFile:1320)
at blh.q(SourceFile:1677)
at blh.ap(SourceFile:860)
at blh.a(SourceFile:303)
at net.minecraft.client.main.Main.main(SourceFile:121)

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

– Head –
Stacktrace:
at axy.a(SourceFile:128)
at atx.a(SourceFile:35)
at afg.a(SourceFile:61)
at aht.a(SourceFile:113)
at bxx.a(SourceFile:318)
at blh.ar(SourceFile:1320)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [cbw['iRoadToGlory'/8978773, l='MpServer', x=416.50, y=86.00, z=-2047.98]]
Chunk stats: MultiplayerChunkCache: 441, 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: -168.00,64.00,261.00 - World: (-168,64,261), Chunk: (at 8,4,5 in -11,16; contains blocks -176,0,256 to -161,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 106159014 game time, 34018658 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: 89 total; [abs['Skeleton'/9743998, l='MpServer', x=346.50, y=45.00, z=-1970.50], cbw['iRoadToGlory'/8978773, l='MpServer', x=416.50, y=86.00, z=-2047.98], abs['Skeleton'/9768208, l='MpServer', x=371.50, y=18.00, z=-2127.50], aan['Creeper'/9748569, l='MpServer', x=428.00, y=41.00, z=-2025.41], aan['Creeper'/9714239, l='MpServer', x=355.34, y=20.00, z=-2026.63], aan['Creeper'/9719203, l='MpServer', x=370.50, y=30.00, z=-1996.50], aan['Creeper'/9768228, l='MpServer', x=353.50, y=21.00, z=-1984.50], aan['Creeper'/9768227, l='MpServer', x=351.50, y=21.00, z=-1986.50], yp['Chicken'/9664116, l='MpServer', x=357.72, y=67.52, z=-2044.09], yp['Chicken'/9662494, l='MpServer', x=426.75, y=93.00, z=-2025.78], yp['Chicken'/9662495, l='MpServer', x=426.75, y=93.00, z=-2025.78], yp['Chicken'/9662492, l='MpServer', x=427.50, y=93.00, z=-2025.78], yp['Chicken'/9662493, l='MpServer', x=428.22, y=93.00, z=-2026.47], yp['Chicken'/9662490, l='MpServer', x=426.75, y=93.00, z=-2027.25], zc['Squid'/9748239, l='MpServer', x=409.81, y=61.06, z=-1984.56], yp['Chicken'/9662491, l='MpServer', x=428.22, y=93.00, z=-2027.25], yp['Chicken'/9664114, l='MpServer', x=344.47, y=69.02, z=-2045.25], yp['Chicken'/9662488, l='MpServer', x=428.22, y=93.00, z=-2027.25], yp['Chicken'/9662489, l='MpServer', x=426.75, y=93.00, z=-2026.50], yp['Chicken'/9664124, l='MpServer', x=364.31, y=65.02, z=-2067.41], yp['Chicken'/9662486, l='MpServer', x=427.59, y=93.00, z=-2027.25], yp['Chicken'/9662487, l='MpServer', x=427.56, y=92.63, z=-2026.56], yp['Chicken'/9662484, l='MpServer', x=426.75, y=93.00, z=-2027.25], yp['Chicken'/9662485, l='MpServer', x=428.22, y=93.00, z=-2025.78], yp['Chicken'/9662483, l='MpServer', x=428.22, y=93.00, z=-2026.46], yp['Chicken'/9664123, l='MpServer', x=375.59, y=67.02, z=-2053.38], yn['Bat'/9760422, l='MpServer', x=356.38, y=50.91, z=-2038.59], yn['Bat'/9699718, l='MpServer', x=451.06, y=47.34, z=-2085.34], yp['Chicken'/9677341, l='MpServer', x=415.44, y=64.00, z=-2096.63], yp['Chicken'/9677340, l='MpServer', x=409.56, y=63.00, z=-2097.34], yp['Chicken'/9680895, l='MpServer', x=432.50, y=62.53, z=-2116.59], yn['Bat'/9760425, l='MpServer', x=365.72, y=48.06, z=-2047.69], yn['Bat'/9747298, l='MpServer', x=491.22, y=55.22, z=-1995.16], yn['Bat'/9765768, l='MpServer', x=463.34, y=42.01, z=-2097.26], yn['Bat'/9683984, l='MpServer', x=370.25, y=46.10, z=-1990.44], yp['Chicken'/9677355, l='MpServer', x=394.59, y=73.00, z=-2111.41], aap['Enderman'/9728632, l='MpServer', x=496.56, y=13.00, z=-2079.22], yp['Chicken'/9662504, l='MpServer', x=495.34, y=62.59, z=-2036.19], yn['Bat'/9683977, l='MpServer', x=360.49, y=38.38, z=-1978.57], yp['Chicken'/9662503, l='MpServer', x=374.44, y=67.00, z=-2034.78], yp['Chicken'/9662496, l='MpServer', x=428.22, y=93.00, z=-2025.78], abs['Skeleton'/9731655, l='MpServer', x=462.81, y=20.00, z=-1995.78], yp['Chicken'/9675808, l='MpServer', x=408.13, y=68.00, z=-2085.16], yp['Chicken'/9675809, l='MpServer', x=408.78, y=68.00, z=-2085.63], yp['Chicken'/9675810, l='MpServer', x=415.66, y=64.00, z=-2095.91], abs['Skeleton'/9731661, l='MpServer', x=457.50, y=22.00, z=-1991.50], aca['Spider'/9767408, l='MpServer', x=414.50, y=44.00, z=-2103.50], acf['Zombie'/9767412, l='MpServer', x=407.06, y=44.00, z=-2099.50], yp['Chicken'/9675805, l='MpServer', x=408.97, y=62.34, z=-2094.78], acf['Zombie'/9767413, l='MpServer', x=407.50, y=44.00, z=-2101.50], yp['Chicken'/9675804, l='MpServer', x=437.50, y=65.00, z=-2088.75], aca['Spider'/9767402, l='MpServer', x=408.88, y=44.00, z=-2099.50], yn['Bat'/9743510, l='MpServer', x=346.94, y=23.94, z=-2035.69], yy['Pig'/9656929, l='MpServer', x=341.69, y=67.00, z=-1991.56], yy['Pig'/9656928, l='MpServer', x=349.53, y=72.00, z=-1974.69], yp['Chicken'/9661189, l='MpServer', x=376.31, y=69.00, z=-2021.56], yp['Chicken'/9656926, l='MpServer', x=479.41, y=62.50, z=-1976.22], abs['Skeleton'/9731533, l='MpServer', x=384.50, y=55.00, z=-2032.50], yn['Bat'/9765107, l='MpServer', x=450.13, y=56.00, z=-1996.22], abs['Skeleton'/9731532, l='MpServer', x=383.50, y=55.00, z=-2029.50], aan['Creeper'/9745605, l='MpServer', x=409.50, y=25.00, z=-1996.50], abs['Skeleton'/9755391, l='MpServer', x=393.50, y=41.00, z=-2119.50], aan['Creeper'/9737360, l='MpServer', x=392.44, y=26.00, z=-1985.06], abs['Skeleton'/9762419, l='MpServer', x=454.09, y=17.00, z=-2004.50], abs['Skeleton'/9689292, l='MpServer', x=462.50, y=60.00, z=-2018.50], abs['Skeleton'/9752630, l='MpServer', x=459.50, y=29.00, z=-1990.50], abs['Skeleton'/9727644, l='MpServer', x=477.50, y=13.00, z=-2059.50], abs['Skeleton'/9727643, l='MpServer', x=479.50, y=13.00, z=-2061.50], abs['Skeleton'/9742706, l='MpServer', x=474.50, y=28.00, z=-1992.50], abs['Skeleton'/9742707, l='MpServer', x=475.94, y=29.00, z=-1988.47], acf['Zombie'/9704281, l='MpServer', x=462.50, y=29.00, z=-2021.50], acf['Zombie'/9741112, l='MpServer', x=339.50, y=26.00, z=-2019.50], yp['Chicken'/9664838, l='MpServer', x=431.28, y=62.47, z=-2078.47], yn['Bat'/9765969, l='MpServer', x=418.53, y=14.10, z=-1993.42], zv['item.item.egg'/9678323, l='MpServer', x=382.03, y=72.00, z=-2097.66], yp['Chicken'/9678320, l='MpServer', x=413.56, y=62.72, z=-2122.94], yp['Chicken'/9678321, l='MpServer', x=410.69, y=62.56, z=-2121.31], abs['Skeleton'/9744493, l='MpServer', x=384.50, y=38.00, z=-2061.50], aan['Creeper'/9741159, l='MpServer', x=347.50, y=20.00, z=-1981.50], acf['Zombie'/9741154, l='MpServer', x=349.50, y=20.00, z=-1983.50], aca['Spider'/9722671, l='MpServer', x=345.00, y=49.09, z=-1999.72], yp['Chicken'/9664831, l='MpServer', x=362.59, y=64.00, z=-2074.59], yp['Chicken'/9673432, l='MpServer', x=383.38, y=71.00, z=-2091.41], yp['Chicken'/9659594, l='MpServer', x=406.44, y=62.59, z=-2008.22], yy['Pig'/9659593, l='MpServer', x=354.91, y=70.00, z=-2001.09], aan['Creeper'/9753273, l='MpServer', x=378.50, y=28.00, z=-1986.50], acf['Zombie'/9753269, l='MpServer', x=384.69, y=27.91, z=-1991.94], aan['Creeper'/9730928, l='MpServer', x=382.50, y=15.00, z=-2039.50], yp['Chicken'/9673430, l='MpServer', x=380.31, y=71.00, z=-2094.47]]
Retry entities: 0 total; []
Server brand: vanilla
Server type: Non-integrated multiplayer server
Stacktrace:
at bxy.a(SourceFile:310)
at blh.b(SourceFile:2133)
at blh.a(SourceFile:317)
at net.minecraft.client.main.Main.main(SourceFile:121)

– System Details –
Details:
Minecraft Version: 14w25a
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_60, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 110464000 bytes (105 MB) / 414711808 bytes (395 MB) up to 477102080 bytes (455 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512m
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 14w25a
LWJGL: 2.9.1
OpenGL: GeForce GT 520M/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
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: English (US)
Profiler Position: N/A (disabled)