Below is the changelog for all buildcraft versions.
Beta versions
2.2.1 Release notes
- SMP pipe render client freeze
Problem related to freeze when using pipes in SMP should be fixed. - Increase oil quantity in medium deposits
Medium oil deposits are now twice as frequent, and contain slightly more oil. - Wrong icon in markers when traveling in pipes
Icon of markers when traveling in pipes have been fixed. - Port to SMP
BuildCraft have been (re) ported to SMP. - Opening autocrafting table in SMP kicks client
Auto-crafting table does crash anymore when openned from the client. - Liquids spawn next to tank if taken out
Liquids can now be correctly collected from tanks. - Stone engines burn animation broken
Stone engine fire animation has been fixed in the GUI. - Oil bucket config
Oil and fuel bucket configuration has been fixed. - Empty bucket in iron engine prevents cooling
Iron engine can now cool down even if they contain an empty bucket. - Used Forge ISidedInventory interfae
ISidedInventory interface is now used, enabling interaction between pipes and
Forge compatible inventories such as RedPower or IndustrialCraft. - Add liquids hook
Liquids hooks have been added, for sub-modding. - Iron pipes don't bounce items
Iron pipe are able to bounce items again. - Oil generation is buggy
Cases of no oil generated, or too much oil, should be fixed. - Unstable wooden pipe source
Source of wooden pipes should not switch randomly anymore.
2.2.0 Release notes
- Fix HD textures
HD texture are now properly supported with liquids. - Do not open diamond pipe with pipe
Diamond pipes will not open when right clicked with a pipe in hand. - Support random liquids in pumps /pipes/tanks
Pipes, pumps and tanks now support any kind of liquid. - Use water to cool iron engines
Iron engines can now be cooled with water. - Implement fuel
Fuel, refined from oil, has been implemented. - Review pipes classes
All pipes now only use one block id now, and liquids are transfered through
dedicated pipes. - Implement power transport
Power can be transported through dedicated pipes. - Review engine heating
Iron engine now heats all the time in usage. - Investigate marker exception
Markers exceptions have been fixed. - Implement refinery
A refinery has been implemented. So far, only transforms oil into fuel. - Scaffolding collisionbox still full block sized
Fixed collision box for quarry frame. - ID conflict detector not intelligent about oil IDs
Fixed automatic id resolution when oil id changes. - Disable buildcraft specific blocks generation
A specific option has been added to deactivate BuildCraft world generation - Improve liquid pipe behavior
Liquid movements in pipes has been changed to avoid liquids getting stuck. - Add lava to the iron engine fuel
Lava can now be used to fuel an iron engine. - Implement filling from tanks to buckets and reverse
Bucket can now be used to fill tanks or get liquids from tanks.
2.2.0 Release notes
- Fix pipes bounding boxes
The boxes around the pipes are now fixed, improving selection / deselection. - Error setting quarries with markers in SMP
Quarries set with custom sizes are now fixed in SMP. - Investigate exception with recipe book
The Mining Well exception is now fix with the recipe book. - Deactivate light effects on engines
Engine no longer have (wrong) light effects. - Investigate recursion in tanks
Infinite recursion in tanks is fixed
Stable versions
1.8.1.1 Release notes
I could not find these, could someone please add them if they know where to find them.
Sidenotes
This article has not been spell-checked since all release notes have been copied and pasted straight from the Buildcraft MinecraftForum wiki.