Bukkit

Version 1.0.3 b26

• Added faction coloring
• Fixed default channel settings
• Minor code cleanup

Version 1.0.3 b24

• Added Heroes support; plugin now parses a player's hero class in chat with the variable %h

Version 1.0.3 b23

• Cleaned up a bunch of code
• Changed plugin.yml's command from /cs to /chatsuite, and cleaned up the aliases
• Consolidated commands into a recognizable and uniform layout

Version 1.0.3 b22

• Added /cs debug, /cs reload, /cs locale, and /cs version, each with corresponding chatsuite.[command] permission nodes.
• Plugin now registers group names to chatsuite.groups.[groupname], where each groupname corresponds to its name in config.yml
• Fixed default permissions

Version 1.0.2

• Added Factions support, via the variable %f in the configuration file.
• beta release

Version 1.0.1

• Fixed deprecated Multiverse method getMVWorlds()
• Minor bug fixes, command implementation

Version 1.0

• Initial github commit
• alpha release

It seems there may be a plugin that is disabling chat events altogether (and routing them through its own chat handler), and as such may cause issues with this plugin.

I am unable (at this time) to determine which plugin this may be.