Bukkit

Spigot version: 13716d9-bd703b8 (MC: 1.8)
Experience Bank 2 version: 1

*Debug chat spam on teleport, and sometimes even just by getting near signs. (chunks whit signs loading in them)
http://imgur.com/Bvg66RA

*Experience is not retrieved correctly when inserted into bottles. Example: I put 100 xp in bank, and bottle it. I use the xp bottles on myself, and I only get 20 xp. (I have also heard rumors of experience simply not being stored and retrieved correctly, but this may most provably be noob players who don't know how the machine works, even though it's explained.)

*Stored experience sometimes dissapears after a server restart.