v4.4.1
- FIX: Automatic ForgeMultipart downloads
- FIX: Dependency on NEI
- FIX: Dependency on other modules

v4.4.0
- PORT: Minecraft 1.7.2
- ADDED: Version checking config
- REMOVED: Colored trees (to be replaced)
- FIX: Pipe priority sorting crash
- FIX: Invert cell inventory render
- FIX: Firewall pipe items not being ghosted
- FIX: Recipes with microblocks not checking NBT
- FIX: Pipe crafting crash

v4.3.7
- FIX: Startup crash

v4.3.6
- ADDED: Firewall pipe
- ADDED: Complex routing
- ADDED: Redstone piping
- FIX: Broadcasters using ore dictionary to provide
- FIX: Crash on requesting
- FIX: Rare crash on block render

v4.3.5
- FIX: !! Routing thread eating up all of CPU !!

v4.3.4
- FIX: !! Huge memory leak in pipe routing thread !!
- FIX: Rare crash when removing pipes

v4.3.3
- CHANGE: Backpacks show name in gui
- FIX: Java 6 crash

v4.3.2
- FIX: Bag load/save

v4.3.1
- FIX: No recipes for lights
- FIX: Stock keeper crash
- FIX: Request gui crash
- FIX: ExtraUtils Server crash

v4.3.0
- CHANGE: Made volcanoes slightly more rare
- CHANGE: Crafting pipes can craft multiple items
- FIX: Backpack slots being locked
- FIX: Framed alloy wire connection bug
- FIX: Strange tree growth
- FIX: Routing FX
- FIX: Rare lamp render crash when teleporting
- FIX: Backpacks resetting anvil name
- FIX: Recipe mirroring

v4.2.2
- ADDED: Extension pipe
- ADDED: Config option for backpack blacklist
- ADDED: Routing chip upgrades
- ADDED: Link/unlink router effects
- FIX: Redstone propagation bug on certain surfaces
- FIX: Crash when placing lamps under bedrock

v4.2.1
- ADDED: Upgrade system for routing chips
- CHANGE: Optimized lamp halo render
- CHANGE: Buttons can be inverted with shift-right-click
- FIX: Stone walls torch placement
- FIX: Timers getting stuck on world time shifts
- FIX: Crash with pipes in unloaded chunks
- FIX: Gui textures

v4.2.0
- ADDED: ProjectRed: Mechanical package (beta)
- ADDED: Item routing system (beta)
- FIX: Version Checker spam

v4.1.0
- ADDED: Version checker
- ADDED: Option to turn off light halos
- CHANGE: Lights use torch placement rules
- CHANGE: Stained trees can only generate in overworld (too OP)
- FIX: Stained leaf decay
- FIX: Flatland generation
- FIX: Ore recipe for tools

v4.0.5
- ADDED: Ore Dictionary registration for gems
- FIX: Crash when world is not installed.

v4.0.4
- ADDED: Retroactive world generation
- ADDED: Stained trees
- CHANGE: Alloy smelter removed
- CHANGE: Only gates with torches emit light
- FIX: Toggle latch torches being off on placement

v4.0.3
- ADDED: Fixtures
- ADDED: Config option for moving all rendering to TESR
- ADDED: Gates emit light
- FIX: Many minor bugs

v4.0.2
- ADDED: Walls for world gen blocks
- CHANGE: Ported to Minecraft 1.6.4
- CHANGE: Lights render halos in inventory
- CHANGE: Pointer recipe
- FIX: Server crash
- FIX: Analog signal re-propagation
- FIX: Illumar buttons dropping regular buttons
- FIX: Lights are always off on world load
- FIX: Container shift clicking
- FIX: Gates dont alert wires upon being rotated/configured
- FIX: State cell not saving correctly
- FIX: Bus Transceiver propagation
- FIX: Bus Transceiver lights rendering above the panel
- *FIX: ProjectRed not loading

v4.0.1
- FIX: alloy smelter crash
- FIX: Basalt is now resistant to TNT
- FIX: Red alloy wires output weak signal to neighbors.
- CHANGE: Lighting rewrite
- CHANGE: Updated license
- ADDED: Cage lamps
- ADDED: Compat module
- ADDED: Red Alloy Ingots can be created using using a Tinkers Construct Smeltery
- *FIX: server crash
- *FIX: alloy smelter render
- *FIX: wire debugger crash
- *FIX: diamond saw silicon cutting

v4.0.0
- Initial release


note: a '*' indicates a patch.