Bukkit

• 1.3.5 This should be more thread-safe, although it looks like my application is already thread safe
• 1.3.3. Offering the option to try out the experimental thread-safe version. Set search.gothreadsafe to true
• 1.3.0 Offered the option to have an opaque list rather than a transparent list.
• 1.2.8 Many internal changes to let the program run more smoothly, such as dumping the vision when reloading and then reloading the vision, to account for changes in block ids in the config.
• 1.2.4 Much new stuff added. More options added to configuration (set cuboid dimensions). Configuration updates itself if it's missing parts. Players' vision is only updated when it needs to be, not every time a block is updated in their world. Permission added (vacuum.noxray.hide) to allow filtering players that are and are not screened for X-Ray. I also fixed the configuration. It wasn't loading properly (if at all).
• 1.0.0 Release! Lots of hard work to get this far, and I'm glad we're here :D

* May not be thread safe!
* It's slow. I'm sorry :/