I have a few mods other installed but managed to get them to work together and everything was fine until I made a Rotary Macerator and tried to place it down.
Here's the crash report, if anybody could tell me what it means
2012-10-23 18:59:54 [INFO] [STDOUT] Error in class 'SourceLWJGL OpenAL'
2012-10-23 18:59:54 [INFO] [STDOUT] Channel null in method 'stop'
2012-10-23 18:59:55 [INFO] [STDERR] java.lang.RuntimeException: java.lang.NullPointerException
2012-10-23 18:59:55 [INFO] [STDERR] at ic2.api.NetworkHelper.announceBlockUpdate(NetworkHelper.java:132)
2012-10-23 18:59:55 [INFO] [STDERR] at ic2.advancedmachines.common.TileEntityBlock.setFacing(TileEntityBlock.java:94)
2012-10-23 18:59:55 [INFO] [STDERR] at ic2.advancedmachines.common.BlockAdvancedMachines.a(BlockAdvancedMachines.java:172)
2012-10-23 18:59:55 [INFO] [STDERR] at si.placeBlockAt(ItemBlock.java:202)
2012-10-23 18:59:55 [INFO] [STDERR] at si.a(ItemBlock.java:90)
2012-10-23 18:59:55 [INFO] [STDERR] at rj.a(SourceFile:88)
2012-10-23 18:59:55 [INFO] [STDERR] at atc.a(PlayerControllerMP.java:358)
2012-10-23 18:59:55 [INFO] [STDERR] at net.minecraft.client.Minecraft.c(Minecraft.java:1318)
2012-10-23 18:59:55 [INFO] [STDERR] at net.minecraft.client.Minecraft.l(Minecraft.java:1731)
2012-10-23 18:59:55 [INFO] [STDERR] at net.minecraft.client.Minecraft.J(Minecraft.java:845)
2012-10-23 18:59:55 [INFO] [STDERR] at net.minecraft.client.Minecraft.run(Minecraft.java:775)
2012-10-23 18:59:55 [INFO] [STDERR] at java.lang.Thread.run(Unknown Source)
2012-10-23 18:59:55 [INFO] [STDERR] Caused by: java.lang.NullPointerException
2012-10-23 18:59:55 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2012-10-23 18:59:55 [INFO] [STDERR] at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
2012-10-23 18:59:55 [INFO] [STDERR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
2012-10-23 18:59:55 [INFO] [STDERR] at java.lang.reflect.Method.invoke(Unknown Source)
2012-10-23 18:59:55 [INFO] [STDERR] at ic2.api.NetworkHelper.announceBlockUpdate(NetworkHelper.java:130)
2012-10-23 18:59:55 [INFO] [STDERR] ... 11 more
2012-10-23 19:00:05 [INFO] [STDOUT] Stopping!
2012-10-23 19:00:05 [INFO] [STDOUT] SoundSystem shutting down...
2012-10-23 19:00:06 [INFO] [STDOUT] Author: Paul Lamb, www.paulscode.com