Bukkit

Changelog here

Fixed:

• NPE occurring when you put an invalid item name on a furnace/transfer sign
• Data not getting saved when storage minecarts close (oldie...)
• Cleanup of a lot of classes, which most likely fixed some unknown bugs as well
• Teleporter sign was failing

Added:

• Location readout when performing /train info or /cart info commands
• Spawn sign: interval in real-time
• '+'-mode (always power on sign)
• Redstone reading from certain directions of the sign (statement)

1.70:

• Fixed detector sign placement bug and errors
• Added remote control batch train operations (multi-train)
• Added train rename feature for signs

1.71:

• Train replacement fixes (load chunks on startup)
• Added velocity statements
• Fixed detector and switcher signs
• Added train display names

1.71.1:

• Fixed destinations not being read properly

Still a TODO:
- wait sign (needs improving)

Reported but failed to replicate (could be a plugin conflict):
- Train keep chunks loaded not always working
If you have this problem, please post the list of plugins you use. In the meantime, you can use other 'minecart persistence' plugins to do this. They use a larger radius to fix the synch gap, so they load a lot more chunks than needed, but if it helps, use it.