Bukkit

2.6.3

• Fixed not being able to delete jails or cells
• Fixed players being sent to wrong Jail
• Fixed NPEs with jailing players in certain circumstances
• Fixed not being able to jail players who were in other worlds
• Fixed not being able to jail offline players
• Fixed improper handling of player inventory (If you don't use jail cells with chests, player inventory will be lost if the server shutdowns.)
• Fixed /JailRecord not displaying any data even though it was enabled (see here for /jailrecord info)
• Fixed /JailRecord not displaying certain information about the player's jail sentence (see here for /jailrecord info)
• Fixed handcuffs not working properly all the time (see here for handcuff information)
• Fixed /jailrecord and /handcuff not being executable via the console
• Fixed players not being released to their previous position if they were jailed offline and the config has release to previous position enabled
• Fixed players gamemode not being stored when they were jailed offline.
• Fixed players losing their inventory when they were transferred to another Jail.
• Changed how we check for updates, better system performance as we aren't using the main thread

2.5.7

• Fixed the ConcurrentModificationException, fixes Ticket #368 and #378
• Fixed the misspellings of Messages, fixes Ticket #371
• Fixed, kind of, NullPointerException when a player joins and there is no cell, fixes Ticket #364
• Fixed jail not sending players who are mounted on something to jail, fixes Ticket #351
• Fixed /jailset not ignoring the casing, fixes Ticket #338
• Fixed the /jail command not working at times, fixes Ticket #372

From 2.5.5

• Numerous bug fixes (including JoinEvent NPE and PreProcessCommand NPE)
• Added JailVersion Command
• Begun adding Handcuff Command
• Changes to some Messages to make them more clear.
• Tried to improve Jailswear
• Jail command no longer allows you to jail players who are already jailed!
• Started adding support for Scoreboards

Shutting down the server will result in all inventories being lost, unless they were jailed in a cell that had a chest. This is planned to be corrected in the rewrite, so please don't post a ticket or comment about it as it is a Known Caveat.