Bukkit

2.6.1

• Improvements
  • Updated default configs
  • Made KillStreaks configurable
  • Made rewards gradient based (configurable)
  • Signs actually work now
  • Misc tweaks and optimizations
• Bug fixes
  • Fixed multiple CME's
  • Fixed CTF bugs
  • Multiple other bug fixes

2.6

• Additions
  • Added WorldEdit integration for arena creation
  • Added per-arena configuration options
  • Added arena spectating
• Improvements
  • Updated to 1.6.4, prepare for 1.7
  • Zombies no longer suck in infect
  • Massive cleanup and optimization
• Bug Fixes
  • Fixed Multiverse loading errors
  • Fixed Essentials incompatibilities
  • Fixed inventory-related bugs
  • Fix message error with bomb powers

None :)

If you happen to find one, report it using a ticket.