This update now fixes the error that I found in the plugin causing the hole plugin to fail under certain conditions. This update also adds a new command, /slhelp. This new command displays all of the plugins features and permissions in the chat.
If you discover any other issues with the plugin, please do send me a message or leave a post on the forum post with your issue and I'll try my best to assist you.
Fixed multiplayer server error.
Completely recoded the plugin.
Streamlined the code.
Added new '/slhelp' command.
Added new in game help menu.
Added new 'SpeedLimit.help' permission.
Added the plugin version to the startup and reload messages.