Here's my Modloader text.
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Mar 27, 2012 10:31:20 AM ModLoader init
FINE: ModLoader 1.2.4 Initializing...
Mar 27, 2012 10:31:20 AM ModLoader readFromClassPath
FINER: Adding mods from /home/anarchitect/.minecraft/bin/minecraft.jar
Mar 27, 2012 10:31:20 AM ModLoader readFromClassPath
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_FCBetterThanWolves 3.58" from mod_FCBetterThanWolves.class
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "Smart Moving 7.3" from mod_SmartMoving.class
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: heal.easy set to 1.0
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: heal.normal set to 0.5
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: heal.hard set to 0.25
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: hunger.easy set to 0.25
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: hunger.normal set to 0.375
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: hunger.hard set to 0.5
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: respawn.visible set to true
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: respawn.default set to true
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Somnia v22 [1.2.4]" from mod_Somnia.class
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/ArmorStand.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: ArmorID set to 135
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Armor 1.2.4" from mod_Armor.class
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/More Stackables.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: minecarts set to 4
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: boats set to 4
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: doors set to 8
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: signs set to 8
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: saddles set to 8
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: food set to 64
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Stackables 1.2.4" from mod_Stackables.class
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/Shelf.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: ShelfID set to 132
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: Render3DItems set to false
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: RotateItems set to false
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Shelf 1.2.4" from mod_Shelf.class
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/Sign Tags.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/mod_Zeppelin-client-1.2.4.0.29.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Zeppelin 1.2.4.0.29" from mod_Zeppelin.class
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_FCBetterThanWolves 3.58"
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "Smart Moving 7.3"
Mar 27, 2012 10:31:21 AM mod_Somnia supportsMinecraftForge
FINE: mod_Somnia: Minecraft Forge was not detected. Disabling SleepHandler.
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Somnia v22 [1.2.4]"
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Armor 1.2.4"
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Stackables 1.2.4"
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Shelf 1.2.4"
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/terrain.png,/Zeppelin/front.png,168). 31 left.
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/terrain.png,/Zeppelin/back.png,169). 30 left.
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/terrain.png,/Zeppelin/top.png,170). 29 left.
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/terrain.png,/Zeppelin/compass.png,171). 28 left.
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/gui/items.png,/Zeppelin/radio.png,38). 84 left.
Mar 27, 2012 10:31:21 AM MetaRotation.MetaRotation addRotationDataFromFile
INFO: Rotation data loaded so far: 0
Mar 27, 2012 10:31:21 AM MetaRotation.MetaRotation addRotationDataFromFile
INFO: Starting reading rotation data from "/home/anarchitect/.minecraft/config/MetaRotation/Vanilla.meta"
Mar 27, 2012 10:31:21 AM MetaRotation.MetaRotation addRotationDataFromFile
INFO: Finished reading rotation data from "/home/anarchitect/.minecraft/config/MetaRotation/Vanilla.meta"
Mar 27, 2012 10:31:21 AM MetaRotation.MetaRotation addRotationDataFromFile
INFO: Rotation data loaded so far: 350
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Zeppelin 1.2.4.0.29"
Mar 27, 2012 10:31:21 AM ModLoader addAllRenderers
FINE: Initialized
FINE: ModLoader 1.2.4 Initializing...
Mar 27, 2012 10:31:20 AM ModLoader readFromClassPath
FINER: Adding mods from /home/anarchitect/.minecraft/bin/minecraft.jar
Mar 27, 2012 10:31:20 AM ModLoader readFromClassPath
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_FCBetterThanWolves 3.58" from mod_FCBetterThanWolves.class
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "Smart Moving 7.3" from mod_SmartMoving.class
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: heal.easy set to 1.0
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: heal.normal set to 0.5
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: heal.hard set to 0.25
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: hunger.easy set to 0.25
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: hunger.normal set to 0.375
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: hunger.hard set to 0.5
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: respawn.visible set to true
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: respawn.default set to true
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Somnia v22 [1.2.4]" from mod_Somnia.class
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/ArmorStand.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: ArmorID set to 135
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Armor 1.2.4" from mod_Armor.class
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/More Stackables.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: minecarts set to 4
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: boats set to 4
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: doors set to 8
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: signs set to 8
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: saddles set to 8
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: food set to 64
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Stackables 1.2.4" from mod_Stackables.class
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/Shelf.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: ShelfID set to 132
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: Render3DItems set to false
Mar 27, 2012 10:31:21 AM ModLoader setupProperties
FINER: RotateItems set to false
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Shelf 1.2.4" from mod_Shelf.class
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/Sign Tags.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Adding mods from /home/anarchitect/.minecraft/mods/mod_Zeppelin-client-1.2.4.0.29.zip
Mar 27, 2012 10:31:21 AM ModLoader readFromModFolder
FINER: Zip found.
Mar 27, 2012 10:31:21 AM ModLoader addMod
FINE: Mod Initialized: "mod_Zeppelin 1.2.4.0.29" from mod_Zeppelin.class
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_FCBetterThanWolves 3.58"
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "Smart Moving 7.3"
Mar 27, 2012 10:31:21 AM mod_Somnia supportsMinecraftForge
FINE: mod_Somnia: Minecraft Forge was not detected. Disabling SleepHandler.
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Somnia v22 [1.2.4]"
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Armor 1.2.4"
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Stackables 1.2.4"
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Shelf 1.2.4"
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/terrain.png,/Zeppelin/front.png,168). 31 left.
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/terrain.png,/Zeppelin/back.png,169). 30 left.
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/terrain.png,/Zeppelin/top.png,170). 29 left.
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/terrain.png,/Zeppelin/compass.png,171). 28 left.
Mar 27, 2012 10:31:21 AM ModLoader addOverride
FINER: addOverride(/gui/items.png,/Zeppelin/radio.png,38). 84 left.
Mar 27, 2012 10:31:21 AM MetaRotation.MetaRotation addRotationDataFromFile
INFO: Rotation data loaded so far: 0
Mar 27, 2012 10:31:21 AM MetaRotation.MetaRotation addRotationDataFromFile
INFO: Starting reading rotation data from "/home/anarchitect/.minecraft/config/MetaRotation/Vanilla.meta"
Mar 27, 2012 10:31:21 AM MetaRotation.MetaRotation addRotationDataFromFile
INFO: Finished reading rotation data from "/home/anarchitect/.minecraft/config/MetaRotation/Vanilla.meta"
Mar 27, 2012 10:31:21 AM MetaRotation.MetaRotation addRotationDataFromFile
INFO: Rotation data loaded so far: 350
Mar 27, 2012 10:31:21 AM ModLoader init
FINE: Mod Loaded: "mod_Zeppelin 1.2.4.0.29"
Mar 27, 2012 10:31:21 AM ModLoader addAllRenderers
FINE: Initialized
::Edit:: Apparently a different install order solves the problem. I still have no idea what went wrong, per se, but I've killed a chicken and prayed to Zarathustra so now it works.