Routing Switches seem to be unbreakable. Tried with pickaxes, shovels, axes and swords.

Other than that when i try to get a routing system up by adding a "Dest=OktasRefuelling" tag to the routing book, it gets deleted. I get the following console error:
Error reading Item NBT packet
java.lang.RuntimeException: Tried to read NBT tag that was too big; tried to allocate: 84bytes where max allowed: 81
at net.minecraft.nbt.NBTSizeTracker.func_152450_a(SourceFile:21) ~[ds.class:?]
at net.minecraft.nbt.NBTTagString.func_152446_a(SourceFile:26) ~[dx.class:?]
at net.minecraft.nbt.NBTTagCompound.func_152449_a(SourceFile:329) ~[dh.class:?]

I need the full log of that error.

As for the Routing Switch, use a Crowbar. Its supposed to work with a pickaxe, but the Forge Harvest API no longer supports multiple tool types.

Ok reproduced the error: http://www.mediafire.com/view/ovioh102m1e6q68/fml-client-latest.log
log was a bit too long for pastebin...

Guide to reproduce:
Create new endless flat world -> cheat in Routing switch and book, open book, type in "Dest=OktasRefuelling" save and close, place in the switch -> error blank page and warning in the console

Problem found, will be fixed in next update.

Ok, problem found, will be fixed in next version.