Ticking memory connection. All other issues like mine are marked as a duplicate to an article that isn't anything like my problem so I don't know what to do.

Solutions have been tried(given by Minecraft users), none work.
Articles similar to mine are all marked as duplicates to "Items in equipment slot / Crashes if CanPickUpLoot is set to 1 in level.dat/player.dat files", though my problem isn't loot related so I have no solution given by Mods.

Crash report:

--- BEGIN ERROR REPORT 1d371008 --------
Full report at:
/Users/Madeleine/Library/Application Support/minecraft/crash-reports/crash-2013-02-11_11.55.33-server.txt
Please show that file to Mojang, NOT just this screen!

Generated 2/11/13 11:55 AM

-- System Details --
Details:
	Minecraft Version: 1.4.7
	Operating System: Mac OS X (i386) version 10.6.8
	Java Version: 1.6.0_29, Apple Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Apple Inc.
	Memory: 329759664 bytes (314 MB) / 550305792 bytes (524 MB) up to 1070399488 bytes (1020 MB)
	JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
	AABB Pool Size: 138995 (7783720 bytes; 7 MB) allocated, 21730 (1216880 bytes; 1 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 13510 (756560 bytes; 0 MB) allocated, 13235 (741160 bytes; 0 MB) used
	Player Count: 1 / 8; [iq['NeonBus'/334, l='Lala', x=-760.68, y=68.00, z=959.97]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

java.lang.ClassCastException: aml cannot be cast to alr
	at als.<init>(SourceFile:34)
	at alr.a(SourceFile:413)
	at alr.g(SourceFile:351)
	at zz.a(SourceFile:394)
	at yc.a(SourceFile:299)
	at yc.c(SourceFile:288)
	at aez.a(SourceFile:384)
	at aez.a(SourceFile:513)
	at acq.a(SourceFile:377)
	at afb.a(SourceFile:29)
	at aev.a(SourceFile:73)
	at abb.a(SourceFile:422)
	at im.a(SourceFile:165)
	at zz.a(SourceFile:709)
	at im.c(SourceFile:104)
	at il.<init>(SourceFile:26)
	at ik.a(SourceFile:172)
	at ik.d(SourceFile:300)
	at gm.d(SourceFile:156)
	at iv.a(SourceFile:275)
	at eb.a(SourceFile:136)
	at cf.b(SourceFile:55)
	at iv.d(SourceFile:57)
	at iw.b(SourceFile:39)
	at bec.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.r(SourceFile:762)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at bdz.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:613)
	at fy.run(SourceFile:849)
--- END ERROR REPORT d98594c8 ----------

Crash report 2:

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 2/10/13 3:50 PM
Description: Ticking memory connection

java.lang.ClassCastException: aml cannot be cast to alr
	at als.<init>(SourceFile:34)
	at alr.a(SourceFile:413)
	at alr.g(SourceFile:351)
	at zz.a(SourceFile:394)
	at yc.a(SourceFile:299)
	at yc.c(SourceFile:288)
	at aez.a(SourceFile:384)
	at aez.a(SourceFile:513)
	at acq.a(SourceFile:377)
	at afb.a(SourceFile:29)
	at aev.a(SourceFile:73)
	at abb.a(SourceFile:422)
	at im.a(SourceFile:165)
	at zz.a(SourceFile:709)
	at im.c(SourceFile:104)
	at il.<init>(SourceFile:26)
	at ik.a(SourceFile:172)
	at ik.d(SourceFile:300)
	at gm.d(SourceFile:156)
	at iv.a(SourceFile:275)
	at eb.a(SourceFile:136)
	at cf.b(SourceFile:55)
	at iv.d(SourceFile:57)
	at iw.b(SourceFile:39)
	at bec.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.r(SourceFile:762)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at bdz.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:613)
	at fy.run(SourceFile:849)


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

-- System Details --
Details:
	Minecraft Version: 1.4.7
	Operating System: Mac OS X (i386) version 10.6.8
	Java Version: 1.6.0_29, Apple Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Apple Inc.
	Memory: 184422880 bytes (175 MB) / 550305792 bytes (524 MB) up to 1070399488 bytes (1020 MB)
	JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
	AABB Pool Size: 9381 (525336 bytes; 0 MB) allocated, 9024 (505344 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 3004 (168224 bytes; 0 MB) allocated, 2320 (129920 bytes; 0 MB) used
	Player Count: 1 / 8; [iq['NeonBus'/353, l='Lala', x=-492.27, y=63.00, z=1311.90]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.