Today, I updated my server to bukkit 1.3.1 R1. I made a new folder on my desktop, copied the start file, the config, logs, world, etc. I also copied my old plugins folder (1.2.5 R4). I moved the old plugins from the folder to another folder, just so that I know which plugins to get. Then, I downloaded the new plugin versions for 1.3.1 from BukkitDev, and started the server. It worked perfectly fine, however I noticed that when I started the server, when enabling plugins, it tried to enable some of the plugins that I moved and didn't update (because the new versions isn't out yet/I found a better plugin). Some got enabled, and some got an error. Can someone please explain to me why this happened? Server Details: Bukkit: 1.3.1 R1 later recommended build as of August 8, 2012. OS: Ubuntu Linux V11.10, all updates from update manages installed before starting server. Hardware: 2 x quad-core Intel Xeons, overclocked to 4.5GHZ, 32GB RAM, GTX 690, etc. Other processes running at the time: mySQL server for my forums. Manufacturer: I built the computer myself.